View source for List of free and open-source software packages

{{Short description|None}}
{{About|software free to be modified and distributed|examples of software free in the monetary sense|List of freeware}}

This is a '''list of [[free and open-source software]]''' ('''FOSS''') '''[[Package manager|packages]]''', [[computer software]] licensed under [[free software license]]s and [[open-source license]]s. Software that fits [[the Free Software Definition]] may be more appropriately called [[free software]]; the [[GNU project]] in particular objects to their works being referred to as [[open-source software|open-source]].<ref name=":0">{{cite web |url=https://www.gnu.org/philosophy/open-source-misses-the-point.html |title=Why Open Source misses the point of Free Software |author=Richard Stallman |date=July 13, 2011 |access-date=August 24, 2011}}</ref> For more information about the philosophical background for open-source software, see [[free software movement]] and [[Open Source Initiative]]. However, nearly all software meeting the Free Software Definition also meets ''[[the Open Source Definition]]'' and vice versa. A small fraction of the software that meets either definition is listed here. Some of the open-source applications are also the basis of [[Commercial software|commercial products]], shown in the [[List of commercial open-source applications and services]].

==Artificial intelligence==
{{See also|Lists of open-source artificial intelligence software|Open-source artificial intelligence}}

=== General AI ===
* [[OpenCog]] – project that aims to build an [[artificial general intelligence]] (AGI) [[Software framework|framework]]. OpenCog Prime is a specific set of interacting components designed to give rise to human-equivalent artificial general intelligence.

===Large language models===
* [[BLOOM (language model)|BLOOM]] – open multilingual language model with 176B parameters
* [[DeepSeek]] – [[DeepSeek#R1|R1]] and [[DeepSeek#V3|V3]]
* [[DBRX]] – [[open-source artificial intelligence|open source]] [[Large language model|LLM]]
* [[GPT-J]] – LLM with 6 billion parameters developed by the [[Nonprofit organization|nonprofit]] [[EleutherAI]]
* [[GPT-1]] – [[OpenAI]] LLM released under the [[MIT License]] in June 2018
* [[GPT-2]] – [[OpenAI]] LLM released under the [[MIT License]] in November 2019
* [[XLNet]] – [[Google]] LLM released as an open source project in June 2019 under the Apache 2.0 license
* [[BERT (language model)|BERT]] – [[Google]] LLM released as an open source project in October 2018 under the Apache 2.0 license
* [[T5 (language model)|T5]] – [[Google]] LLM released as an open source project in 2019 under the Apache 2.0 license

=== Computer vision ===
* [[AForge.NET]] – [[computer vision]], [[artificial intelligence]] and [[robotics]] library for the [[.NET]] [[Software framework|framework]]
* [[OpenCV]] – computer vision library in [[C++]]

=== Machine learning ===
* See [[List of open-source machine learning software]]
* See [[#Data mining|Data Mining]] below
* See [[R (programming language)|R programming language]] – packages of statistical learning and analysis tools

=== Planning ===
* [[Regular Language description for XML|TREX]] – reactive planning

=== Robotics ===
{{See also|List of open-source hardware projects#Robotics|l1=List of open-source robotics hardware|Open-source robotics}}
* [[ArduPilot]]
* [[CoppeliaSim]]
* [[Gazebo (simulator)|Gazebo]]
* [[Mobile Robot Programming Toolkit]]
* [[OpenRTM-aist]]
* [[Paparazzi Project]]
* [[Player Project]]
* [[Python Robotics]]
* [[Robot Operating System]] (ROS)
* [[TurtleBot]]
* [[Webots]] – robot simulator

== Assistive technology ==

===Speech (synthesis and recognition)===
* [[CMU Sphinx]] – [[speech recognition]] software from [[Carnegie Mellon University]]
* [[Emacspeak]] – audio desktop
* [[ESpeak]] – compact software [[Speech synthesis|speech synthesizer]] for English and other languages
* [[Festival Speech Synthesis System]] – general multilingual speech synthesis
* [[Modular Audio Recognition Framework]] – voice, audio, speech [[Natural language processing|NLP]] processing
* [[NonVisual Desktop Access]] (NVDA) – [[screen reader]], for Windows
* [[Text2Speech]] – Text-To-Speech (TTS) Software

===Other assistive technology===
* [[Dasher (software)|Dasher]] – unique text input software
* [[Gnopernicus]] – AT suite for GNOME 2
* [[Virtual Magnifying Glass]] – multi-platform screen magnification tool

==CAD==
{{Main category|Free computer-aided design software}}
* [[Archimedes (CAD)]]
* [[Art of Illusion]]
* [[Blender (software)|Blender]]
* [[BRL-CAD]] – [[constructive solid geometry]] (CSG) [[solid modeling]] [[computer-aided design]] (CAD) system
* [[FreeCAD]] – parametric 3D CAD modeler with a focus on [[mechanical engineering]], [[BIM]], and product design
* [[LeoCAD]]
* [[LibreCAD]] – 2D CAD software using [[AutoCAD]]-like interface and file format
* [[MakeHuman]]
* [[MeshLab]]
* [[Open Cascade Technology]] (OCCT) – CAD kernel for 3D CAD, [[Computer-aided manufacturing|CAM]], CAE
* [[OpenSCAD]] – scripting-based 3D CAD software
* [[QCAD]]
* [[SolveSpace]] – 2D and 3D CAD, constraint-based parametric modeler with simple mechanical simulation abilities
* [[Sweet Home 3D]]
* [[Wings 3D]]

=== Computer-aided engineering (CAE) ===
{{See also|List of computer-aided engineering software}}
* [[Advanced Simulation Library]]
* [[ASCEND]]
* [[DWSIM]]
* [[Elmer FEM solver]]
* [[Gmsh]] 
* [[LibreCAD]]
* [[MapleSim]]
* [[Modelica]]
* [[OpenSim (simulation toolkit)|OpenSim]]
* [[OpenFOAM]]
* [[Project Chrono]]
* [[Salome (software)|Salome]]
* [[SimScale]]
* [[SU2 code]]
* [[xeokit]]

=== Computer-aided manufacturing (CAM) ===
====[[Subtractive manufacturing|Subtractive]]====
* [[LinuxCNC]]
* [[FreeCAD]] – [https://wiki.freecad.org/CAM%20Workbench Path Workbench]

====[[Additive Manufacturing]]====
* [[Cura (software)|Cura]]
* [[Slic3r]]
* [[MeshLab]]
* [[OctoPrint]]
* [[Marlin (firmware)|Marlin]]
* [[Klipper (firmware)|Klipper]]
* [[Repetier-Host]]
* [[AstroPrint]]

=== Electronic design automation (EDA) ===
{{Main category|Free electronic design automation software}}{{See also|Comparison of EDA software}}{{See also|List of free electronics circuit simulators}}
* [[Electric (software)|Electric]]
* [[FreePCB]]
* [[Fritzing]] – CAD software for the design of [[Electronic hardware|electronics hardware]] to build more permanent circuits from prototypes
* [[gEDA]]
* [[GNU Circuit Analysis Package]] (Gnucap)
* [[Icarus Verilog]]
* [[KiCad]] – suite for electronic design automation (EDA) for schematic capture, PCB layout, manufacturing file viewing, SPICE simulation, and engineering calculation
* [[KTechLab]]
* [[Magic (software)|Magic]]
* [[Ngspice]]
* [[pcb-rnd]]
* [[Oregano (software)|Oregano]]
* [[Quite Universal Circuit Simulator]] (QUCS)
* [[Verilator]]
* [[XCircuit]]

==Computer simulation==
{{main|List of free and open-source computer simulation software}}
* [[Blender (software)|Blender]] – [[3D computer graphics]] [[software toolset]] used for creating [[Animation|animated films]], [[visual effects]], art, [[3D printing|3D printed]] models, and [[motion graphics]]
* [[FreeCAD|FreeCad]] – equivalent of Blender, towards to mechanical engineering
* [[OpenFOAM]] – software used for [[computational fluid dynamics]] (or CFD)
* [[FlightGear]] ''-'' atmospheric and orbital flight simulator with a flight dynamics engine (JSBSim) that was used in a 2015 NASA benchmark<ref name=":02">{{Cite web|date=2015|title=Further Development of Verification Check-casesforSix-Degree-of-Freedom Flight Vehicle Simulations|url=https://nescacademy.nasa.gov/src/flightsim/Reports/aiaa-15-1810-EOM_chkcases-II.pdf|url-status=live|archive-url=https://web.archive.org/web/20210310134926/https://nescacademy.nasa.gov/src/flightsim/Reports/aiaa-15-1810-EOM_chkcases-II.pdf|archive-date=March 10, 2021|website=NASA Engineering and Safety Center Academy}}</ref> to judge new simulation code to space industry standards
* [[SimPy]] – queue-theoretic event-based simulator written in [[Python (programming language)|Python]]
* [[Salome (software)|Salome]] – generic platform for Pre- and Post-Processing for numerical simulation

==[[Cypherpunk]] software==
=== Cryptography and Privacy Software ===
{{See also|Comparison of cryptography libraries|Comparison of disk encryption software|Comparison of instant messaging protocols}}
* [[Pretty Good Privacy#OpenPGP|OpenPGP]] – open-source version of [[Pretty Good Privacy]]
* [[GNU Privacy Guard]] – replacement for [[Pretty Good Privacy|PGP]]
* [[OpenSSL]] – [[library (computing)|library]] for applications that provide secure communications over [[computer network]]s
* [[NaCl (software)]] – crypto library 
* [[Libsodium]] – fork of [[NaCl (software)|NaCl]]
* [[VeraCrypt]] – disk encryption software forked from [[TrueCrypt]]
* [[LUKS]] – standard for [[disk encryption]] on Linux systems
* [[Tor (network)]] – free [[overlay network]] for enabling [[Anonymity|anonymous communication]]
* [[Tails (operating system)]] – security-focused Linux distro using Tor by default
* [[Signal (software)]] – secure messaging app
* [[Off-the-Record Messaging]] – protocol for secure instant messaging
* [[GPGTools]] – macOS suite for [[GNU Privacy Guard|GnuPG]]-based encryption

=== Hacking and Network Security Tools ===
{{See also|Transport Layer Security}}
* [[Aircrack-ng]] – Wi-Fi security auditing tool
* [[BackTrack]] – predecessor to [[Kali Linux]]
* [[Burp Suite#Community Edition|Burp Suite Community Edition]] – [[Information technology security assessment|security assessment]] and [[penetration test]]ing of web applications
* [[Ghidra]] – software reverse engineering suite developed by the [[National Security Agency|NSA]]
* [[Hashcat]] – password recovery utility
* [[Hydra (software)]] – login cracker supporting numerous protocols
* [[John the Ripper]] – [[password cracking]] tool
* [[Kali Linux]] – penetration testing [[Linux distribution]]
* [[Metasploit Project]] – framework for developing and executing [[Exploit (computer security)|exploit code]]
* [[Netcat]] – network utility for reading/writing data across networks
* [[Nikto (vulnerability scanner)]] – web server vulnerability scanner
* [[Nmap]] – network scanning, [[port scanner]], and [[Information technology audit|auditing]] tool
* [[OpenSSH]] – implementation of the [[Secure Shell|SSH]] protocol
* [[Radare2]] – reverse engineering framework
* [[Snort (software)]] – network intrusion detection system
* [[sqlmap]] – automated SQL injection and database takeover tool
* [[Suricata (software)]] – network threat detection engine
* [[Volatility (memory forensics)]] – memory forensics framework for incident response
* [[Wireshark]] – network protocol analyzer
* [[YARA]] – tool to identify and classify malware

=== Decentralized and Anonymous Communication Projects ===
* [[Freenet]] – [[peer-to-peer]] platform for [[Internet censorship circumvention|censorship-resistant]] communication
* [[Bitmessage]] – rncrypted peer-to-peer messaging protocol
* [[I2P]] – anonymous network layer for secure communication
* [[Tor (network)]] – free [[overlay network]] for enabling [[Anonymity|anonymous communication]]

===Decentralized File Sharing and Storage===
{{See also|Comparison of BitTorrent clients}}
* [[qBittorrent]] – [[BitTorrent]] client
* [[Transmission (BitTorrent client)]] – lightweight BitTorrent client
* [[IPFS]] – InterPlanetary File System for decentralized storage and sharing
* [[RetroShare]] – secure communication platform with file sharing

=== Cryptocurrencies and Anonymous Finance ===
{{See also|List of cryptocurrencies}}
* [[Zerocoin]] – privacy-focused cryptocurrency protocol
* [[Zcash]] – cryptocurrency based on [[Zerocoin protocol|Zerocoin]] using [[Zk-SNARK|zk-SNARKs]]
* [[Monero]] – privacy-focused cryptocurrency using [[Ring signature|ring signatures]]
* [[Nym (mixnet)]] — [[Mix network]]

== Cybersecurity ==
{{Main|Cybersecurity}}

===Antivirus===
{{See also|Antivirus software}}
* [[ClamAV]] –  cross-platform [[Antivirus software|antimalware toolkit]] written in [[C (programming language)|C]] and [[C++]], able to detect many types of malware including [[Computer virus|viruses]] 
* [[ClamWin]] – [[Antivirus software|antivirus tool]] for [[Windows]] and written in C, C++
* [[Lynis]] – security [[Information security audit|audit tool]] (set of [[Shell script|shell scripts]]) for [[Unix]] and [[Linux]]

===Data loss prevention===
{{See also|Data loss prevention software}}
* [[MyDLP]] not updated since 2014

===Data recovery===
{{See also|Data recovery|List of data recovery software}}
* [[dvdisaster]]
* [[ddrescue]]
* [[Foremost (software)|Foremost]]
* [[PhotoRec]]
* [[TestDisk]]

====Forensics====
{{See also|Forensic science}}
* [[The Coroner's Toolkit]]
* [[The Sleuth Kit]]

=====Anti-forensics=====
{{See also|Anti-forensics}}
* [[USBKill]]
* [[Tails (operating system)|Tails]]
* [[BusKill]]

===Disk erasing===
{{See also|Disk Cleanup}}
* [[Darik's Boot and Nuke|DBAN]]
* [[Srm (Unix)|srm]]

===Encryption===
{{See also|Encryption|Encryption software|List of cryptographic file systems|Comparison of cryptography libraries}}
* [[Bouncy Castle (cryptography)|Bouncy Castle]]
* [[GnuPG]]
* [[GnuTLS]]
* [[KGPG]]
* [[NaCl (software)|NaCl]]
* [[OpenSSL]]
* [[Seahorse (software)|Seahorse]]
* [[Signal (messaging app)|Signal]]
* [[stunnel]]
* [[TextSecure]]
* [[wolfCrypt]]
* [[7-Zip]]

====Disk encryption====
{{See also|Disk encryption|Disk encryption software}}
* [[dm-crypt]]
* [[FreeOTFE]] and [[FreeOTFE Explorer]]
* [[eCryptfs]]
* [[VeraCrypt]]

===Firewall===
{{See also|Firewall (computing)}}
* [[Firewalld]]
* [[Uncomplicated Firewall]] (ufw)
* [[Firestarter (firewall)|Firestarter]]
* [[IPFilter]]
* [[ipfirewall|ipfw]]
* [[iptables]]
* [[nftables]]
* [[LEAF Project]]
* [[M0n0wall]]
* [[PeerGuardian]]
* [[PF (firewall)|PF]]
* [[pfSense]]
* [[OPNsense]]
* [[IpTables Rope|Rope]]
* [[Shorewall]]
* [[SmoothWall]]
* [[Vyatta]]
* [[VyOS]]

===Network and security monitoring===
{{Main category|Free network management software}}
* [[Snort (software)|Snort]] – network [[intrusion detection system]] (IDS) and intrusion prevention system (IPS)
* [[OpenVAS]] – software framework of several services and tools offering [[Vulnerability (computing)|vulnerability]] scanning and [[vulnerability management]]

===Secure Shell (SSH)===
{{See also|Secure Shell}}
* [[Cyberduck]] – [[macOS]] and Windows client (since version 4.0)
* [[Lsh]] – server and client, with support for [[Secure remote password protocol|SRP]] and [[Kerberos (protocol)|Kerberos]] authentication
* [[OpenSSH]] – client and server
* [[PuTTY]] – client-only

===Password management===
* [[Bitwarden]]
* [[KeePass]]
* [[KeePassXC]] – multiplatform fork able to open KeePass databases
* [[Password Safe]]
* [[Mitro]]
* [[Pass (software)|Pass]]

===Other cybersecurity programs===
{{Main category|Free security software}}

== Data storage and management ==

=== Disk cleaning utilities ===
* [[BleachBit]]

===Backup software===
{{Main category|Free backup software}}

===Database management systems (including administration)===
{{Main category|Free database management systems}}
* [[Apache Cassandra]] – [[NoSQL]] [[database]] from [[Apache Software Foundation]] offers support for clusters spanning multiple datacenter
* [[Apache CouchDB]] – [[NoSQL]] [[database]] from [[Apache Software Foundation]] with [[multi-master replication]]
* [[MariaDB]] – community-developed relational database management system with pluggable storage engines and commercial support
* [[PostGIS]] – adds support for geographic objects to the [[:Category:PostgreSQL|PostgreSQL]] as per [[Open Geospatial Consortium]] (OGC)
* [[:Category:PostgreSQL|PostgreSQL]] – [[relational database management system]] emphasizes on extensibility and [[SQL]] compliance and available for [[Microsoft Windows|Windows]], [[Linux]], [[FreeBSD]], and [[OpenBSD]]

=== Data mining ===
* [[Environment for DeveLoping KDD-Applications Supported by Index-Structures]] (ELKI) – data mining software framework written in [[Java (programming language)|Java]] with a focus on clustering and outlier detection methods
* [[FrontlineSMS]] – information distribution and collecting via [[text messaging]] ([[Short Message Service|SMS]])
* [[KNIME|Konstanz Information Miner (KNIME)]]
* [[OpenNN]] – [[neural network software]] library written in C++
* [[Orange (software)]] – data visualization and data mining for novice and experts, through visual programming or Python scripting. Extensions for bioinformatics and text mining
* [[RapidMiner]] – data mining software written in Java, fully integrating Weka, featuring 350+ operators for preprocessing, machine learning, visualization, etc. – the ''prior'' version is available as open-source
* [[Scriptella]] ETL – [[extract transform load|ETL (Extract-Transform-Load)]] and script execution tool. Supports integration with J2EE and Spring. Provides connectors to CSV, LDAP, XML, JDBC/ODBC, and other data sources
* [[Weka (machine learning)|Weka]] – data mining software written in Java featuring machine learning operators for classification, regression, and clustering
* [[JasperSoft]] – data mining with programmable abstraction layer

===Data Visualization Components===
* [[ParaView]] – plotting and visualization functions developed by Sandia National Laboratory; capable of massively parallel flow visualization utilizing multiple computer processors
* [[VTK]] – toolkit for 3D computer graphics, image processing, and visualisation

===Digital Asset Management software system===

===Disk partitioning software===
{{Main category|Free partitioning software}}
* [[GParted]]
* [[FIPS (computer program)]]
* [[TestDisk]]

===Enterprise search engines===
* [[ApexKB]] (formerly known as Jumper)
* [[Lucene]]
* [[Nutch]]
* [[Solr]]
* [[Xapian]]

===ETLs (Extract Transform Load)===

* [[KNIME|Konstanz Information Miner (KNIME)]]
* [[Pentaho]]

===File archivers===
{{Main category|Free data compression software}}
* [[PeaZip]]
* [[7-Zip]]

===File systems===
* [[OpenAFS]] – [[distributed file system]] supporting a very wide variety of operating systems
* [[Tahoe-LAFS]] – distributed file system/[[Cloud storage]] system with integrated privacy and security features
* [[CephFS]] – distributed file system included in the Ceph storage platform

== Desktop publishing ==
* [[Collabora Online]] Draw and Writer – edition of LibreOffice accessible from a web browser
* [[Scribus]] – designed for layout, typesetting, and preparation of files for professional-quality image-setting equipment. It can also create animated and interactive PDF presentations and forms
* [[LyX]] – "What You See Is What You Mean" document creation system, LyX makes use of the [[LaTeX]] markup macro system for [[TeX]], allowing the elegant creation of documents which match up with the layouts in it for various document classes

== E-book management and editing ==
* [[Calibre (software)|Calibre]] – cross-platform suite of [[ebook]] software
* [[Collabora Online]] Writer – edition of LibreOffice accessible from a web browser
* [[Sigil (application)|Sigil]] – editing software for e-books in the [[EPUB]] format

== Education ==
{{See also|List of online educational resources#|Learning management system|l1=Free or open-source educational platforms and resources}}
=== E-learning, learning support ===
{{Main category|Free learning support software|Virtual learning environment}}
* [[ATutor]] – web-based Learning Content Management System (LCMS)
* [[Canvas (LMS)|Canvas LMS]] – web-based, open, extensible learning management system
* [[Chamilo]] – web-based e-learning and content management system
* [[Claroline]] – collaborative Learning Management System
* [[DoceboLMS]] – SAAS/cloud platform for learning
* [[EFront (eLearning software)|eFront]] – icon-based learning management system
* [[H5P]] – framework for creating and sharing interactive HTML5 content
* [[IUP Portfolio]] – educational platform for [[Education in Sweden|Swedish schools]]
* [[ILIAS]] – web-based learning management system (LMS)
* [[Moodle]] – learning management system
* [[OLAT]] – web-based Learning Content Management System
* [[Omeka]] – content management system for online digital collections
* [[Sakai Project]] – web-based learning management system
* [[SWAD (software)|SWAD]] – web-based learning management system

=== Academic advising ===
* [[FlightPath (software)|FlightPath]] – academic advising software for universities

===Educational suites for children===
* [[Tux Paint]] – painting application for 3–12 year olds
* [[GCompris]] – educational entertainment, aimed at children aged 2–10

===Language===
* [[Alpheios Project]]
* [[Anki (software)]]
* [[FirstVoices]]
* [[Kiten (program)|Kiten]]

===Operating systems===
* [[Linux]] – unix-based general use OS
* [[FreeBSD]]
* [[Fuchsia (operating system)|Fuchsia]]
* [[RedoxOS]]

===Mind mapping & others===
* [[Vym (software)]]
* [[Compendium (software)]]
* [[Gnaural]] – brainwave entrainment software

===Offline learning & Open data===
{{Main|Offline learning|Open data}}
* [[Kiwix]] – offline web browser that allows users download Wikipedia entire content and use for [[offline learning]], later was expanded with repositories for Wikimedia Foundation, public domain texts from Project Gutenberg, many of the Stack Exchange sites, and other resources
* [[OpenStreetMap]] – OpenStreetMap was developed in 2004, it uses [[Open data]] and users data input through [[Crowdsourcing]] and [[Web mapping]] to create a complete and downloadable alternative to other online maps, this allow users to enter data when there is no data available due to lack of governance and economic interest or due lower population of the places mapped

===Typing===
* [[KTouch]] – touch typing lessons with a variety of keyboard layouts
* [[Tux Typing]] – typing tutor for children, featuring two games to improve typing speed

==Engineering==
{{See also|List of free and open-source software packages#Computer-aided engineering (CAE)|l1=List of open-source computer aided engineering software|List of free electronics circuit simulators|Comparison of EDA software#List by developer|l3=List of electrical engineering software|Lists of engineering software}}
* [[Advanced Simulation Library]]
* [[ASCEND]] 
* [[Calculix]] 
* [[CHEMKIN]] – [[chemical kinetics]]
* [[COCO simulator]] – chemical [[Process simulation|process simulator]]
* [[CP2K]] – [[quantum chemistry]] and [[solid-state physics]]
* [[DWSIM]] – chemical [[Process simulation|process simulator]]
* [[General Mission Analysis Tool]] (GMAT) – space mission analysis
* [[GNU Octave]] – [[List of numerical-analysis software|numerical-analysis]]
* [[GROMACS]] – simulations of [[protein]]s, [[lipid]]s, and [[nucleic acid]]s
* [[JSBSim]] – [[flight dynamics]] [[ Software engine|engine]]
* [[LAMMPS]] – [[Molecular dynamics]]
* [[Open Babel]] – [[chemical informatics]]
* [[OpenModelica]] – chemical [[Process simulation|process simulator]]
* [[OpenSees]] – [[earthquake engineering]]
* [[OpenVSP]] – parametric aircraft geometry tool
* [[Pyomo]] – [[mathematical optimization]]
* [[REFPROP]] – reference Fluid Thermodynamic and Transport Properties
* [[XFOIL]] – analysis of subsonic isolated [[airfoil]]s

==File formats==
===2D===
====[[Raster graphics|Raster]] imagery====
{{See also|Ghostscript|OpenRAW|LibRaw|dcraw}}
* [[.apng]] – [[Animated Portable Network Graphics]]
* [[.avif]] – [[AV1 Image File Format]]
* [[.bpg]] – [[Better Portable Graphics]]
* [[OpenEXR|.exr]] – [[OpenEXR]]
* [[.fits]] – [[Flexible Image Transport System]] primarily for [[Astronomy]]
* [[Free Lossless Image Format|.flif]] – [[Free Lossless Image Format]]
* [[.gif]] – [[Graphics Interchange Format]]
* [[.iff]] / [[.lbm]] – [[InterLeaved BitMap]]
* [[.jng]] – [[JPEG Network Graphics]]
* [[JPEG|.jpg or .jpeg]] – [[Joint Photographic Experts Group]]
* [[.jxl]] – [[JPEG XL]]
* [[.mng]] – [[Multiple-image Network Graphics]]
* [[Magick Image File Format|.miff]] / [[Magick Image File Format|.mi]] – [[Magick Image File Format]]
* [[Netpbm|.pam, .pbm, .pgm, .ppm, .pnm]] – [[Netpbm|Netpbm file formats]]
* [[.pgf]] – [[Progressive Graphics File]]
* [[.png]] – [[Portable Network Graphics]]
* [[.qoi]] – [[QOI (image format)|Quite OK Image Format]]
* [[.tiff]] – [[Tag Image File Format]]
* [[Wireless Application Protocol Bitmap Format|.wbmp]] – [[Wireless Application Protocol Bitmap Format]]
* [[.webp]]
* [[.xbm]] – [[X BitMap]]
* [[XCF (file format)|.xcf]] – [[GIMP]]
* [[.xpm]] – [[X PixMap]]

====[[Vector graphics|Vector]] imagery====
* [[.cgm]] – [[Computer Graphics Metafile]]
* [[.eps]] – [[Encapsulated PostScript]]
* [[.pdf]] – [[Portable Document Format]]
* [[Precision Graphics Markup Language|.pgml]] – [[Precision Graphics Markup Language]]
* [[.svg]] – [[Scalable Vector Graphics]]
* [[Vector Markup Language|.vml]] – [[Vector Markup Language]], [[Deprecation|deprecated]] by [[Scalable Vector Graphics|SVG]]
* [[Xar (graphics)|.xar]] – [[Xar (graphics)]]

===3D===
* [[3D Manufacturing Format|.3mf]] – [[3D Manufacturing Format]]
* [[Additive manufacturing file format|.amf]] – [[Additive manufacturing file format]]
* [[Blender (software)#File format|.blend]] – [[Blender (software)|Blender]]
* [[.dae]] – COLLADA
* [[AutoCAD DXF|.dxf]] – [[AutoCAD DXF|Drawing Exchange Format]], publicly documented format, developers can work with it in open-source projects, though not fully open-source itself. 
* [[.fbx]]
* [[.gltf|.gltf/.glb]] – [[GlTF|Graphics Library Transmission Format]]
* [[RGBE image format|.hdr]] – [[Radiance (software)|Radiance HDR]]
* [[Industry Foundation Classes|.ifc]] – [[Industry Foundation Classes]]
* [[IGES|.iges]] – [[Initial Graphics Exchange Specification]]
* [[Wavefront .obj file|.obj]] – developed by [[Wavefront Technologies]]
* [[OFF (file format)|.off]] – [[OFF (file format)|Object File Format]]
* [[.ply]] – [[.ply|Polygon File Format]]
* [[Radiance (software)#Scene description format|.rad]] – [[Radiance (software)|Radiance]]
* [[ISO 10303-21|.step/.stp]]
* [[STL (file format)|.stl]]
* [[Universal Scene Description|.usd]] – [[Universal Scene Description]]
* [[VRML|.vrml]] – [[Virtual Reality Modeling Language]]
* [[.x3d]]

===Video===
{{See also|x264}}
* [[Matroska|.mkv]] – [[Matroska]]
* [[Theora|.ogv]] – [[Theora]]
* [[VP8|.vp8]]
* [[VP9|.vp9]]
* [[WebM|.webm]]

===Audio===
{{See also|Advanced Audio Coding|LAME|Resource Interchange File Format|List of scorewriters#Free software|l4=List of open-source musical notation scorewriters}}
* [[Audio Interchange File Format|.aiff]] – [[Audio Interchange File Format]]
* [[.flac]] – [[Free Lossless Audio Codec]]
* [[.ogg]] 
* [[Opus (audio format)|.opus]]
* [[WAV|.wav]]

===Document & Text===
{{See also|ConTeXt}}
* [[AsciiDoc|.adoc]] – AsciiDoc
* [[EPUB|.epub]] – [[ebook]] format
* [[LaTeX|.latex]] – {{Linked TeX wordmark|latex}}, macro package built on top of [[TeX]] for simplification
* [[Markdown|.md]] – [[Markdown]]
* [[OpenDocument|.odt]] – [[OpenDocument]]
* [[Rich Text Format|.rtf]] – [[Rich Text Format]]
* [[TeX|.tex]] – high-quality [[typography]] for [[mathematical notation]], [[List of common physics notations|physics]], [[Chemical formula|chemistry]], [[Engineering notation|engineering]]/[[scientific notation]]
* [[Texinfo|.texinfo]]

===Web and Interactive Media===
* [[CSS|.css]] – [[Cascading Style Sheets]]
* [[.html]] – [[HyperText Markup Language]]
* [[JSON|.json]] – [[GeoJSON]], [[JSON-LD]], [[JSON-RPC]], [[JsonML]], [[Smile (data interchange format)|Smile]], [[UBJSON]]
* [[MathML|.mml]] – [[MathML]]

===Database & Data Storage===
* [[Apache Avro|.avro]] – [[Apache Avro]]
* [[Chemical Markup Language|.cml]] – [[Chemical Markup Language]]
* [[Comma-separated values|.csv]] – [[Comma-separated values]]
* [[Hierarchical Data Format|.hdf5]] – [[Hierarchical Data Format]]
* [[.ods]] – [[OpenDocument Spreadsheet]]
* [[Apache ORC|.orc]] – [[Apache ORC]]
* [[Apache Parquet|.parquet]] – [[Apache Parquet]]
* [[Protocol Buffers|.protobuf]] – [[Protocol Buffers]] developed by [[Google]]
* [[.shp]] – [[Shapefile]]
* [[.sqlite]] – [[SQLite]]
* [[Tab-separated values|.tsv]] – [[Tab-separated values]]
* [[.xml]] – [[Extensible Markup Language]]

== File managers ==
{{Main category|Free file managers}}

==Finance==

=== Accounting ===
{{See also|Comparison of accounting software}}
* [[1DayLater]] – invoicing software
* [[GnuCash]] – [[double-entry book-keeping]]
* [[HomeBank]] – personal accounting software
* [[KMyMoney]] – double-entry book-keeping
* [[LedgerSMB]] – double-entry book-keeping
* [[RCA open-source application]] – management accounting application
* [[SQL Ledger]] – double-entry book-keeping
* [[TurboCASH]] – double-entry book-keeping for Windows

=== Cryptocurrency ===
{{See also|Cryptocurrency}}
* [[Bitcoin]] – blockchain platform, peer-to-peer decentralised digital currency
* [[Ethereum]] – blockchain platform with smart contract functionality

=== CRM ===
{{See also|Customer relationship management}}
* [[CiviCRM]] – Constituent Relationship Management software aimed at charities and NGOs
* [[iDempiere]] – business Suite, ERP and CRM
* [[SuiteCRM]] – web-based CRM

=== ERP ===
{{See also|Enterprise resource planning}}
* [[Adempiere]] – [[Enterprise resource planning]] (ERP) business suite
* [[OFBiz|Apache OFBiz]] – suite of enterprise applications from [[Apache Software Foundation]]
* [[Compiere]] – ERP solution automates accounting, supply chain, inventory, and sales orders
* [[Dolibarr]] – web-based ERP system
* [[ERPNext]] – web-based ERP system for managing accounting and finance
* [[ERP5]] – Single Unified Business Model based system written with [[Python (programming language)|Python]] and [[Zope]] 
* [[iDempiere]] – fully navigable on PCs, tablets and smartphones driven only by a community of supporters
* [[JFire]] – ERP business suite written with [[Java (programming language)|Java]] and [[Java Data Objects|JDO]]
* [[LedgerSMB]] – [[Double-entry book-keeping|double entry]] [[accounting]] and ERP system written with [[Perl]]
* [[metasfresh]] – [[Enterprise resource planning|ERP]] Software
* [[Odoo]] – ERP, CRM and CMS
* [[Openbravo]] – web-based ERP
* [[Tryton]] – ERP

=== Human resources ===
* [[OrangeHRM]] – commercial human resource management

=== Microfinance ===
* [[Mifos]] – [[microfinance]] Institution management software

=== Process management ===
* [[Bonita Open Solution]] – Business Process Management

== Games ==
{{Main|List of open-source video games}}

===Game engines===
{{See also|List of game engines}}
{{col-begin|width=75%}}
{{col-2}}
* [[A-Frame (virtual reality framework)|A-Frame (VR)]]
* [[Adventure Game Studio]]
* [[Marathon Trilogy#Modern developments|Alpha One]]
* [[Ardor3D]]
* [[Babylon.js]]
* [[Blend4Web]]
* [[Blender Game Engine]]
* [[ClanLib]]
* [[Cocos2d]]
* [[Crystal Space]]
* [[Cube Engine]]
* [[Cube 2 engine]]
* [[Dagor Engine]]
* [[Defold]]
* [[Delta3D]]
* [[Dim3]]
* [[DimensioneX Multiplayer Engine]]
* [[Adam Saltsman#Flixel|Flixel]]
* [[Game Editor]]
* [[GDevelop]]
* [[Godot (game engine)|Godot]]
* [[Horde3D]]
{{col-2}}
* [[id Tech 4| id Tech 1-4]]
* [[Irrlicht Engine|Irrlicht]]
* [[ioquake3]]
* [[Jake2]]
* [[Java 3D]]
* [[jMonkeyEngine]]
* [[Kivy (framework)|Kivy]]
* [[LayaBox#LayaAir|LayaAir]]
* [[LibGDX]]
* [[Löve (game framework)|LÖVE]]
* [[Moai (software)|Moai]]
* [[Monkey X]]
* [[MonoGame]]
* [[Open 3D Engine]]
* [[OGRE]]
* [[OHRRPGCE]]
* [[ONScripter]]
* [[OpenClonk]]
* [[OpenMW]]
* [[OpenSimulator]]
* [[ORX]]
* [[Panda3D]]
{{col-2}}
* [[Phaser (game framework)|Phaser]]
* [[PlayCanvas]]
* [[PlayN]]
* [[Pygame]]
* [[Quake II engine]]
* [[Ren'Py]]
* [[Solar2D]]
* [[Starling Framework]]
* [[StepMania]]
* [[Stratagus]]
* [[Stride (game engine)|Stride]]
* [[Three.js]]
* [[TIC-80]]
* [[Torque (game engine)|Torque3D]]
* [[Turbulenz#Turbulenz engine|Turbulenz engine]]
* [[Twine (software)|Twine]]
* [[Visual Pinball]]
* [[Wintermute Engine]]
{{col-end}}

===Physics engines===
{{col-begin|width=75%}}
{{col-2}}
* [[Box2D]]
* [[Bullet (software)|Bullet]]
* [[Cannon.js]]
* [[Chipmunk (software)|Chipmunk]]
* [[ Newton Game Dynamics]]
{{col-2}}
* [[Open Dynamics Engine]]
* [[PhysX|NVIDIA PhysX]]
* [[Phyz]]
* [[Project Chrono]]
{{col-end}}

===Shader languages===
* [[ARB assembly language]]
* [[Cg (programming language)|Cg]]
* [[OpenGL Shading Language]]
* [[Open Shading Language]]
* [[Standard Portable Intermediate Representation]]

=== Action ===
* ''[[Nexuiz]] – [[first-person shooter]]''
* [[OpenArena]] – [[first-person shooter]]
* ''[[Red Eclipse]] – [[first-person shooter]]''
* ''[[Tremulous]] – [[first-person shooter]]''
* ''[[Unvanquished (video game)|Unvanquished]] – [[First-person shooter]]''
* [[Xonotic]] – [[first-person shooter]] that runs on a heavily modified version of the [[Quake engine]] known as the [[DarkPlaces engine]]
* [[Warsow (video game)|''Warsow'']] – [[first-person shooter]] fast-paced [[Shooter game#Arena shooter|arena FPS]] game that runs on the [[Qfusion]] engine

===Application layer===
* [[Wine (software)|WINE]] – allows [[Microsoft Windows|Windows]] applications to be run on [[Unix-like]] operating systems

===Chess===
* [[ChessV]]
* [[Fairy-Max]]
* [[GNU Chess]]
* [[PyChess]]
* [[XBoard]]
* [[Lichess]]

=== Educational games ===
* [[GCompris]] – software suite comprising [[educational entertainment]] software for children aged 2 to 10
* [[Tux, of Math Command]]
* [[Tux Paint]]

=== Video game emulation ===
{{main|Video game console emulator}}
* [[MAME]] – multi-platform [[emulator]] for [[arcade game]] systems 
* [[Multi Emulator Super System|MESS]] – multi-platform emulator
* [[RetroArch]] – cross-platform front-end for emulators, [[game engine]]s and [[video games]]
* [[Snes9x]] – [[Super Nintendo Entertainment System|Super Nintendo]] emulator 
* [[Stella (emulator)|Stella]] – [[Atari 2600]] emulator
* [[PCSX-Reloaded|PCSX]] – [[PlayStation emulator]]
* [[PCSX2]] – [[PlayStation 2]] emulator
* [[PPSSPP]] – [[PlayStation Portable]] emulator
* [[Project64]] – [[Nintendo 64]] emulator 
* [[RetroArch]] – emulator and media player frontend 
* [[RPCS3]] – [[PlayStation 3]] emulator
* [[Dolphin (emulator)]] – [[GameCube]] and [[Wii]] emulator
* [[Citra (emulator)]] – [[Nintendo 3DS]] and [[Wii]] emulator
* [[Cemu]] – [[Wii U]] emulator
* [[TIC-80]] – [[virtual machine]] [[game engine]] that mimics the [[8-bit computing|8-bit]] systems of the 1980s

=== Music video games ===
* [[Frets on Fire]]

==== Karaoke ====
* [[UltraStar]]

==== Rhythm game ====
* [[StepMania]]

=== Puzzle ===
* [[Pingus]] – [[Lemmings (video game)|''Lemmings'']] alternative with penguins instead of lemmings

=== Sandbox ===
* [[Luanti]] – voxel game engine

=== Snake games ===
* [[GLtron]]

=== Simulation ===

* [[Endless Sky]] – [[space trading and combat simulation]]
* [[FlightGear]] – [[flight simulator]]
* [[OpenTTD]] – [[business simulation game]] in which players try to earn money via transporting passengers and freight by road, rail, water and air
* [[SuperTuxKart]] – [[kart racing game]] that features mascots of various open-source projects

=== Strategy ===
* [[0 A.D. (video game)|''0 A.D.'']] – [[real-time strategy]] video game
* [[Freeciv]] – [[turn-based strategy]] game inspired by proprietary Sid Meier's [[Civilization (series)|Civilization]] series
* [[Glest]]
* [[The Battle for Wesnoth]] – turn-based strategy video game with [[fantasy]] setting

==Genealogy==
{{Main category|Free genealogy software}}
* [[Gramps (software)]] – genealogy software

== Geographic information systems ==
{{main list|List of open source geographic information system software}}
* [[QGIS]] – cross-platform desktop [[geographic information system]] (GIS) application to view, edit, and analyse geospatial data

==Graphical user interface==

===Desktop environments===
{{Main category|Free desktop environments}}

===Window managers===
{{Main category|Free X window managers}}

===Windowing system===
{{Main category|Free windowing systems}}

==Groupware==
{{Main category|Free groupware}}

===Content management systems===
{{Main category|Free content management systems}}

===Wiki software===
{{Main category|Free wiki software}}

== Healthcare software ==
{{Main|List of open-source health software|List of open-source bioinformatics software}}

==Integrated library management software==
* [[Evergreen (software)|Evergreen]] – integrated Library System initially developed for the [[Georgia (U.S. state)|Georgia]] Public Library Service's [[PINES]] catalog
* [[Koha (software)|Koha]] – SQL-based library management
* [[NewGenLib]]
* [[OpenBiblio]]
* [[PhpMyBibli|PMB]]
* [[refbase]] – web-based institutional repository and reference management software

==Image editor==
* [[Darktable]] – digital image workflow management, including RAW photo processing
* [[digiKam]] – integrated photography toolkit including editing abilities
* [[GIMP]] – raster graphics editor aimed at image retouching/editing
* [[Hugin (software)|Hugin]] – [[panorama stitching]]
* [[Inkscape]] – vector graphics editor
* [[Karbon (software)|Karbon]] – scalable vector drawing application in KDE
* [[Krita]] – digital painting, sketching and 2D animation application, with a variety of brush engines
* [[LazPaint]] – raster and vector graphics editor, aimed at being simpler to use than GIMP
* [[LightZone]] – digital photo editor software application
* [[Luminance HDR]] – [[multi-exposure HDR capture|high dynamic range image]]s
* [[RawTherapee]] – digital image workflow management aimed at RAW photo processing

==Maps & navigation==
* [[OpenStreetMap]] – open geographic database updated and maintained by a community of volunteers via open collaboration
* [[OsmAnd]] – freemium maps & navigation Android and iOS app
* [[Organic Maps]] – offline map and navigation app for Android & iOS
* [[CoMaps]] (Android, iOS)

==Mathematics==
{{Main list|List of open-source software for mathematics}}
* [[ALTRAN]]
* [[FriCAS]]
* [[GAP (computer algebra system)]]
* [[GiNaC]]
* [[gnuplot]]
* [[Maxima (software)|Maxima]]
* [[Mathomatic]]
* [[Normaliz]]
* [[SageMath]]
* [[Singular (software)]]
* [[SymPy]]
* [[Yacas]]

===Computer algebra systems===
* [[Axiom (computer algebra system)|Axiom]]
* [[Cadabra (computer program)|Cadabra]]
* [[Cambridge Algebra System]]
* [[CPMP-Tools]]
* [[CoCoA]]
* [[Erable]]
* [[PARI/GP]]
* [[Reduce (computer algebra system)|Reduce]]
* [[Xcas]]

===[[Cryptography]]===
{{See also|Comparison of cryptography libraries}}

===Physics===
====[[Computational electromagnetics]]====
* [[Meep (software)|Meep]]
* [[Elmer FEM solver]]
* [[Numerical Electromagnetics Code]]

====[[Computational fluid dynamics]]====
* [[Code_Saturne]]
* [[FEATool Multiphysics]]
* [[MFEM]]
* [[Nek5000]]
* [[Nektar++]]
* [[OpenFOAM]]
* [[SU2 code]]

==== [[Computational particle physics]] ====
* [[APFEL (software)|APFEL]]
* [[CompHEP]]
* [[Geant4]]
* [[OpenScientist]] 
* [[UrQMD]]

==== [[Computational astrophysics]] ====
{{See also|List of cosmological computation software}}
* [[Astropy]]
* [[CMBFAST]]
* [[GADGET]]

==== [[Monte Carlo method]] ====
{{See also|List of software for Monte Carlo molecular modeling}}
* [[CP2K]]
* [[EGS (program)|EGS]]
* [[MCSim]]
* [[McStas]]
* [[McXtrace]]
* [[MPMC]]
* [[OpenMC]]
* [[TARDIS (software)|TARDIS]]

===symbolic manipulation systems===
* [[FORM (symbolic manipulation system)]]

=== Statistics ===
{{See also|Comparison of statistical packages|List of statistical software#Open-source|l2=Open-source statistical software}}
* [[R (programming language)|R]] – statistics software

=== Numerical analysis ===
{{See also|List of numerical-analysis software|List of programming languages by type#Numerical analysis|l2=List of numerical analysis programming languages|Comparison of numerical-analysis software|List of optimization software}}
* [[Octave (language)|Octave]] – numerical analysis software
* [[Scilab]] – numerical analysis software

=== Geometry ===
{{See also|List of interactive geometry software}}
* [[Geogebra]] – geometry and algebra
* [[C.a.R.]]
* [[CaRMetal]]
* [[DrGeo]]
* [[Kig (software)|Kig]]
* [[KSEG (software)|KSEG]]

=== [[Plot (graphics)|Plotting software]] ===
* [[Chart.js]]
* [[D3.js]]
* [[ggplot2]]
* [[Graphics Layout Engine]]
* [[Gnuplot]]
* [[Grace (plotting tool)|Grace]]
* [[Matplotlib]]
* [[Plotly]]
* [[PLplot]]
* [[PyX]]
* [[ROOT]]
* [[SciDAVis]]
* [[Vega and Vega-Lite visualisation grammars|Vega]]

===Charting===
{{See also|List of charting software|Category:Diagramming software|l2=Diagramming software|Comparison of JavaScript charting libraries|List of information graphics software}}
* [[JFreeChart]]
* [[Matplotlib]]
* [[R (programming language)|R]]

=== Mathematical notation software ===
{{See also|Mathematical notation|Typesetting|Comparison of TeX editors}}
{{col-begin|width=70%}}
{{col-2}}
* [[AUCTeX]]
* [[Apache OpenOffice#Components|Apache OpenOffice Math]]
* [[AsciiMath]]
* [[Calligra Words#Formula editor|Calligra Words – Formula editor]]
* [[GeoGebra]]
* [[GNOME LaTeX]]
* [[GNU TeXmacs]]
* [[Gummi (software)|Gummi]]
* [[KaTeX]]
* [[Kile]]
* [[LaTeX]]
* [[LibreOffice Math#Included applications in LibreOffice|LibreOffice Math]]
* [[LyX]]
{{col-2}}
* [[MathJax]]
* [[MathML]]
* [[Notepad++]]
* [[Overleaf]]
* [[TeX]]
* [[TeX Live]]
* [[Texmaker]]
* [[TeXnicCenter]]
* [[TeXShop]]
* [[TeXstudio]]
* [[TeXworks]]
* [[Vim (text editor)|Vim]]
{{col-end}}

=== Mathematical art software ===
{{See also|List of mathematical art software}}
{{col-begin|width=70%}}
{{col-2}}
* [[Apophysis (software)|Apophysis]]
* [[Electric Sheep]] 
* [[Fyre (software)|Fyre]]
* [[MilkDrop]] 
* [[openPlaG]] 
* [[XaoS]] 
* [[R (programming language)|R]] / [[R (programming language)#Mandelbrot set|R Mandelbrot set]]s
* [[Picogen]] 
* [[GeoGebra]]
{{col-2}}
* [[Processing (programming language)|Processing]]
* [[P5.js]]
* [[matplotlib]]
* [[gnuplot]]
* [[Inkscape#Object creation|Inkscape spirograph]]
* [[LaTeX]]- [[PGF/TikZ]]
* [[3Blue1Brown#Manim|Manim]]
* [[D3.js]]
{{col-end}}

=== Spreadsheet ===
* [[Collabora Online|Collabora Online Calc]] – spreadsheet component of the [[Collabora Online]] package
* [[LibreOffice Calc]] – spreadsheet component of the [[LibreOffice]] package
* [[OnlyOffice|OnlyOffice Spreadsheets]] – spreadsheet software of OnlyOffice suite
* [[Gnumeric]] – spreadsheet program of the [[GNOME Project]] 
* [[Calligra Sheets]] – spreadsheet component of the [[Calligra Suite]] in [[KDE]]
* [[Pyspread]] – spreadsheet which uses Python for macro programming, and allows each cell to contain data, the results of a calculation, a Python program, or the results of a Python program

==Mobile software==
* [[Celestia]] (Android, iOS)
* [[Calligra]] (Android)
* [[Collabora Online|Collabora Office]] (Android, ChromeOS, iOS, iPadOS)
* [[CoMaps]] (Android, iOS)
* [[Conversations (software)|Conversations]] (Android)
* [[F-Droid]] (Android) – [[app store]] and [[software repository]]
* [[I2P]] (Android) – anonymous network layer (implemented as a [[mix network]]) that allows for [[Internet censorship circumvention|censorship-resistant]], [[peer-to-peer]] communication
* [[Kiwix]] – offline web browser that allows users to download the entire content of Wikipedia for [[offline learning]] purposes. (Android)
* [[Krita]] (Android)
* [[Linphone]] (Android, iOS)
* [[:fr:Monal_(logiciel)|Monal]] (iOS)
* [[Kali NetHunter#NetHunter App Store|NetHunter App Store]] (Android) – fork of [[F-Droid]] for [[Kali NetHunter]]
* [[OsmAnd]] – freemium maps & navigation Android and iOS app
* [[OpenVPN]] (Android, iOS) – [[virtual private network]] (VPN) system that implements techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It implements both [[Client-server architecture|client and server]] applications
* [[Orbot]] (Android, iOS) – [[Free software|free]] [[Proxy server|proxy]] [[Mobile app|app]] that provides [[anonymity]] on the [[Internet]] for users of the [[Android (operating system)|Android]] and [[iOS]] [[Operating system|operating systems]]. It allows traffic from apps such as web browsers, [[email]] clients, map programs, and others to be routed via the Tor network
* [[Organic Maps]] – offline map and navigation app for Android & iOS
* [[Conversations (software)#Quicksy|Quicksy]] (Android)
* [[Tor Browser]] – onion-routed browser by [[The Tor Project]], based on [[Firefox ESR]]
* [[VLC media player|VLC]] (Android, iOS)
* [[Wikipedia]] (Android, iOS) – See also: [[List of Wikipedia mobile applications]]

== Media ==

===Audio editors, audio management===
{{Main|Comparison of free software for audio}}
* [[Audacity (audio editor)|Audacity]]
* [[Ardour (software) |Ardour]] – professional digital audio workstation
* [[LMMS]] – digital audio workstation

===CD/USB-writing software===
{{Main category|Free optical disc authoring software}}
* [[Brasero (software)]]
* [[cdrtools]]
* [[K3b]]
* [[X-CD-Roast]]

===Flash animation===
* [[Pencil2D]] – for animations
* [[SWFTools]] – for scripting

===Game engines===
{{Main|List of game engines}}
* [[Blender Game Engine]] – discontinued 2019
* [[Godot (game engine)|Godot]] – application for the design of cross-platform video games
* [[MonoGame]] – [[C Sharp (programming language)|C#]] framework 
* [[Open 3D Engine|Open3DEngine]] – based on [[Amazon Lumberyard]]
* [[Stride (game engine)|Stride]] – (prev. Xenko) 2D and 3D [[cross-platform]] [[game engine]] originally developed by [[Silicon Studio]]

====Chess engines====
* [[KnightCap]]
* [[Leela Chess Zero]] – [[Universal Chess Interface]] [[chess engine]]
* [[Stockfish (chess)|Stockfish]] – [[Universal Chess Interface]] [[chess engine]]

===Graphics===
{{Main category|Free graphics software}}

==== 2D ====
* [[Pencil2D]] – simple 2D graphics and animation program
* [[Synfig]] – 2D vector graphics and timeline based animation
* [[TupiTube]] (formerly KTooN) – application for the design and creation of animation
* [[OpenToonz]] – part of a family of 2D animation software
* [[Krita]] – digital painting, sketching and 2D animation application, with a variety of brush engines
* [[Blender (software)|Blender]] – computer graphics software, Blender's Grease Pencil tools allow for 2D animation within a full 3D pipeline
* [[mtPaint]] – [[raster graphics editor]] for creating [[Icon (computing)|icons]], [[pixel art]]

====3D====
* [[Blender (software)|Blender]] – computer graphics software featuring modeling, sculpting, texturing, rigging, simulation, rendering, camera tracking, video editing, and compositing
* [[FreeCAD]]
* [[MakeHuman]]
* [[OpenFX (software)|OpenFX]] – modeling and animation software with a variety of built-in post processing effects
* [[Picogen]] – [[Scenery generator|terrain generator]]
* [[Seamless3d]] – node-driven 3D modeling software
* [[Wings 3D]] – [[Subdivision surface|subdivision modeler]] inspired by [[N-World|Nendo]] and [[Mirai (software)|Mirai]] from Izware

====3D rendering====
* [[Aqsis]]
* [[Blender (software)#Cycles|Cycles]] and [[Blender (software)#EEVEE|EEVEE]] – [[Blender (software)|Blender]] rendering
* [[LuxCoreRender]]
* [[MoonRay]]
* [[POV-Ray]]
* [[Radiance (software)]]
* [[Sunflow]]

===Image galleries===
{{Main category|Free image galleries}}
* [[Shotwell (software)|Shotwell]]
* [[Wikimedia Commons]]

===Image viewers===
* [[Eye of GNOME]]
* [[F-spot]]
* [[feh (image viewer)|feh]]
* [[Geeqie]]
* [[Gthumb]]
* [[Gwenview]]
* [[KPhotoAlbum]]
* [[Opticks (software)|Opticks]]

===Maps===
{{See also|List of GIS data sources|Geographic information system|Geographic information system software#Open source software|l3=GIS Open source software}}
{{col-begin|width=65%}}
{{col-2}}
* [[GeoDa]] 
* [[GeoServer]]
* [[GeoTools]]
* [[GRASS GIS]]
* [[GvSIG]]
* [[ILWIS]]
* [[JUMP GIS]]
* [[Kosmo (GIS)]]
* [[Libre Map Project]]
* [[MapWindow GIS]]
{{col-2}}
* [[Mapnik]]
* [[MapServer]]
* [[Marble (software)|Marble]]
* [[OpenStreetMap]]
* [[OpenLayers]]
* [[PostGIS]]
* [[QGIS]]
* [[SAGA GIS]]
* [[uDig]]
* [[Whitebox Geospatial Analysis Tools]]
{{col-end}}

===Multimedia codecs, containers, splitters===
{{Main category|Free multimedia codecs, containers, and splitters}}

===Music===
{{See also|Comparison of free software for audio}}

===Subtitle===

* [[Aegisub]]
* [[Gnome Subtitles]]
* [[Subtitle Edit]]

===Television===
{{main|List of free television software}}
{{Main category|Free television software}}
{{See also|Comparison of PVR software packages}}

===Video converters===
{{Main category|Free video conversion software}}
* [[Dr. DivX]]
* [[FFmpeg]]
* [[MEncoder]]
* [[OggConvert]]

===Video editing===
{{See also|List of video editing software#Free_(libre)_or_open-source}}
* [[Avidemux]]
* [[AviSynth]]
* [[Blender (software)|Blender]]
* [[Cinelerra]]
* [[Flowblade]]
* [[Kdenlive]]
* [[Kino (software)|Kino]]
* [[LiVES]]
* [[Losslesscut|LosslessCut]]
* [[Natron (software)|Natron]]
* [[Olive (software)|Olive]]
* [[OpenShot]]
* [[Open Movie Editor]]
* [[Pitivi]]
* [[Shotcut]]
* [[VirtualDub]]
* [[VirtualDubMod]]
* [[VLMC#VLMC|VideoLAN Movie Creator]]

====DVD authoring====
* [[DeVeDe]]
* [[DVD Flick]]
* [[DVDStyler]]

=== Screencast ===
* [[recordMyDesktop]]
* [[Open Broadcaster Software]] (OBS Studio) – cross-platform streaming and recording program

===Other media packages===
* [[Celtx]] – media pre-production software

=== Ripping ===
* [[K9Copy]]
* [[Thoggen]]

===Video encoders===
{{Main|Comparison of video codecs}}
* [[Avidemux]]
* [[HandBrake]]
* [[FFmpeg]]
* [[OggConvert]]

===Video players===
{{Main|Comparison of video player software}}
* [[Media Player Classic]]
* [[VLC media player]]
* [[mpv (media player)|mpv]]

== Networking and Internet ==

===Advertising===
* [[Revive Adserver]]

===Communication-related===
* [[Asterisk PBX|Asterisk]] – telephony and [[Voice over IP|VoIP]] server
* [[Ekiga]] – video conferencing application for [[GNOME]] and [[Microsoft Windows]]
* [[Conference XP|ConferenceXP]] – video conferencing application for [[Windows XP]] or later
* [[:fr:Dino_(logiciel)|Dino]] – [[XMPP|xmpp]] client, supporting both [[OMEMO]] encryption and [[Jingle (protocol)|Jingle]] [[Conference call|Audio]]/[[Videotelephony|Video]] protocol, under [[Windows]], [[Linux]] and [[Berkeley Software Distribution|BSD]]
* [[FreePBX]] – front-end and advanced PBX configuration for [[Asterisk PBX|Asterisk]]
* [[FreeSWITCH]] – telephony platform
* [[Gajim]] – xmpp client
* [[Jami (software)|Jami]] – cross-platform, peer to peer instant-messaging and video-calling protocol that offers end-to-end encryption and SIP client
* [[Jitsi]] – [[Java (programming language)|Java]] VoIP and Instant Messaging client
* [[QuteCom]] – voice, video, and IM client application
* [[Enterprise Communications System sipXecs]] – SIP Communications Server
* [[Telegram (software)|Telegram]]
* [[Twinkle (software)|Twinkle]] – VoIP softphone
* [[Tox (protocol)|Tox]] – cross-platform, peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption

===E-mail===
{{Main category|Free email software}}
* [[Amavis]] – email content filter
* [[Claws Mail]] – email Client 
* [[Fetchmail]] – email Retrieval 
* [[Geary (software)|Geary]] – email client based on [[WebKitGTK+]]
* [[GNUMail]] – cross-platform email client
* [[Hula (software)|Hula]] – discontinued mail and calendar project 
* [[K-9 Mail]] – Android Email Client
* [[MailScanner]] – email security system
* [[MH Message Handling System]] – email Client 
* [[Modest (email client)|Modest]] – email Client 
* [[Mozilla Mail & Newsgroups]] – email Client that was part of the now discontinued [[Mozilla Application Suite]]
* [[Mozilla Thunderbird]] – email, news, RSS, and chat client
* [[POPFile]] – cross-platform mail filter 
* [[Roundcube]] – web-based [[IMAP]] email client 
* [[Sylpheed]] – email and News Client 
* [[Sympa]] – [[Mailing list management software|MLA]] software

===File transfer===
{{Main category|Free file transfer software}}

* [[FileZilla|Filezilla]]
* [[OnionShare]]

===Grid and distributed processing===
* [[GNU Queue]]
* [[HTCondor]]
* [[pexec]]

===Instant messaging===
{{Main category|Free instant messaging clients}}

===IRC Clients===
{{Main category|Free IRC clients}}

===Middleware===
* [[Apache Axis2]] – [[Web service]] framework (implementations are available in both [[Java (programming language)|Java]] & [[C (programming language)|C]])
* [[Apache Geronimo]] – application server
* [[Bonita Open Solution]] – J2EE web application and java BPMN2 compliant engine
* [[GlassFish]] – application server
* [[Apache Tomcat]] – servlet container and standalone webserver
* [[JBoss]] – application server
* [[OpenRemote]] – IoT Middleware
* [[TAO (software)]] – C++ implementation of the OMG's CORBA standard
* [[Enduro/X]] – C/C++ middleware platform based on X/Open group's XATMI and XA standards

===RSS, Atom readers, aggregators===
* [[Akregator]] – platforms running [[KDE]]
* [[Liferea]] – platforms running [[GNOME]]
* [[NetNewsWire]] – macOS, iOS
* [[RSS Bandit]] – Windows, using [[.NET]] framework
* [[RSSOwl]] – Windows, macOS, Solaris, Linux using Java SWT Eclipse
* [[Sage (Mozilla Firefox extension)]]

===Peer-to-peer file sharing===
{{Main category|Free file sharing software}}
{{Category see also|Free BitTorrent clients}}
* [[I2P]] – anonymous network layer (implemented as a [[mix network]]) that allows for [[Internet censorship circumvention|censorship-resistant]], [[peer-to-peer]] communication
* [[OnionShare]] – file sharing app using Tor network
* [[Popcorn Time]] – multi-platform media player
* [[qBittorrent]] – BitTorrent client
* [[Transmission (BitTorrent client)|Transmission]] – BitTorrent client
* [[Deluge (software)|Deluge]] – BitTorrent client

===Portal Server===
* [[Drupal]]
* [[Liferay]]
* [[Sun Java System Portal Server]]
* [[uPortal]]

===Remote access and management===
* [[NX technology|FreeNX]]
* [[OpenVPN]]
* [[rdesktop]]
* [[Synergy (software)|Synergy]]
* [[Virtual Network Computing|VNC]] ([[RealVNC]], [[TightVNC]], [[UltraVNC]])
* [[Remmina]] (based on FreeRDP)
* [[RustDesk]]

===Routing software===
{{Main category|Free routing software}}

===Web browsers===
{{Main category|Free web browsers}}

==== Graphical ====
* [[Chromium (web browser)|Chromium]] – web browser using the custom [[Blink (browser engine)|Blink]] engine from which [[Google Chrome]] draws its [[source code]]
* [[Brave (web browser)|Brave]] – privacy-focused web browser based on Chromium browser
* [[Falkon]] – web browser based on Blink engine, a [[KDE]] project
* [[Firefox]] – [[Mozilla]]-developed web browser using [[Gecko (software)|Gecko]] layout engine
* [[Waterfox]] – Firefox [[Fork (software development)|fork]] supporting legacy extensions, 64-bit only
* [[Pale Moon]] – customizable fork of Firefox
* [[Tor Browser]] – onion-routed browser by [[The Tor Project]], based on [[Firefox ESR]]
* [[GNOME Web]] – [[WebKit]]-based web browser for the [[GNOME]] desktop environment
* [[Midori (web browser)|Midori]] – web browser using the WebKit layout engine
* [[qutebrowser]] – keyboard operated Webkit-based browser with [[Vi (text editor)|vi-like]] [[keybindings]]
* [[SeaMonkey|SeaMonkey Navigator]] – the SeaMonkey internet suite's web browser
* [[Surf (web browser)|Surf]] – minimal [[Tab (interface)|tab-less]] browser by [[suckless.org]] using [[WebKitGTK]]
* [[Firefox Focus]] – privacy-focused mobile web browser from [[Mozilla]] available for [[Android (operating system)|Android]] and [[iOS]]

==== Text-based ====
* [[Lynx (web browser)|Lynx]] – [[text-based web browser]] developed since 1992
* [[Links (web browser)|Links]] – [[Text-based user interface|text-based]] browser with a [[Linux framebuffer|framebuffer-based]] graphical mode
* [[ELinks]] – fork of Links with [[JavaScript]] support

===Webcam===
* [[Cheese (software)|Cheese]] – GNOME webcam application
* [[Guvcview]] – Linux webcam application

===Webgrabber===
* [[cURL]]
* [[HTTrack]]
* [[Wget]]

===Web-related===
* [[Apache Cocoon]] – web application framework
* [[Apache Tomcat]]
* [[Apache HTTP Server|Apache]] – web server
* [[AWStats]] – log file parser and analyzer
* [[BookmarkSync]] – tool for browsers
* [[Caddy (web server)|Caddy]] – extensible, cross-platform, web server written in Go. 
* [[Cherokee (web server)|Cherokee]] – HTTP server
* [[curl-loader]] – HTTP/HTTPS/FTP/FTPS loading and testing tool
* [[Docker (software)|Docker]] – Docker Engine is open-source for [[Linux]] only
* [[FileZilla]] – FTP
* [[H2O (web server)|H2O]] – supports [[HTTP/2]], [[Transport Layer Security|TLS]], and [[HTTP/2 Server Push|server push]]
* [[Hiawatha (web server)|Hiawatha]] – HTTP server
* [[HTTP File Server]] – file server software, with a drag-and-drop interface
* [[lighttpd]] – HTTP Server
* [[Lucee]] – CFML application server
* [[Nginx]] – web server/reverse proxy and e-mail (IMAP/POP3) proxy
* [[NetKernel]] – Internet application server
* [[Qcodo]] – PHP5 framework
* [[Squid (software)|Squid]] – web proxy cache
* [[thttpd]] – designed for simplicity, small [[memory footprint]], and speed
* [[Vaadin]] – Java-based framework for creating web applications
* [[Varnish (software)|Varnish]] – web application accelerator/reverse proxy and load balancer/HTTP router
* [[XAMPP]] – package of web applications including [[Apache HTTP Server|Apache]] and [[MariaDB]]
* [[Zope]] – web application server

===Web search engines===
* [[SearXNG]] – self-hostable [[metasearch engine]]
* [[YaCy]] – P2P-based [[search engine]]

===Other networking programs===
* [[JXplorer]] – [[Lightweight Directory Access Protocol|LDAP]] client
* [[Nextcloud]] – fork of [[ownCloud]]
* [[OpenLDAP]] – [[Lightweight Directory Access Protocol|LDAP]] server
* [[ownCloud]] – file share and sync server
* [[Wireshark]] – network monitor

== Office software ==

=== Text editors ===
{| class="wikitable sortable"
! Software !! Platform !! Formats
|-
| [[AbiWord]] || Linux, Windows || .txt
|-
| [[Atom (text editor)]] || macOS 10.9 or later, Windows 7 and later, and Linux || .txt
|-
| [[gedit]] || 	Linux, MacOS || .txt
|-
| [[GNOME Text Editor]] || Linux || .txt
|-
| [[Kate (text editor)]] || 25 Linux distributions, Microsoft Windows, macOS || .txt
|-
| [[Leafpad]] || Linux, BSD, Maemo || .txt
|-
| [[Metapad]] || Windows || .txt
|-
| [[Mousepad (software)|Mousepad]] || Linux, BSD, Maemo || .txt
|-
|[[Notepad++]]
|Windows
|.txt
|-
|[[Visual Studio Code]] ||Linux, Windows, MacOS || .txt
|}

=== Spreadsheet software ===
{| class="wikitable sortable"
! Software !! Operating system !! Format
|-
| [[Gnumeric]] || Unix-like (Linux included) || .gnm, .gnumeric
|-
| [[GNU Oleo]] || Linux || .oleo<ref>{{cite web | url=https://help.gnome.org/users/gnumeric/stable/sect-file-formats.html.en | title=File Formats}}</ref>
|-
| [[Pyspread]] || Unix-like, Windows || .CSV, .XLS, .SVG, .PDF
|-
| [[Sheetster]] || [[Cross-platform software|Cross-platform]] || JSON, XML, .XLS, .CSV, xlsx/.ooxml, .exml, .zip
|}

=== Office suites ===
* [[Apache OpenOffice]] – the cross platform office productivity suite from [[Apache Software Foundation]] (ASF) consists of programs for word processing, spreadsheets, presentation, diagrams and drawings, databases, etc.
* [[Calligra Suite]] – the office productivity suite from [[KDE]] consists of programs for word processing, spreadsheets, presentation, databases, vector graphics, and digital painting
* [[Collabora Online]] – edition of LibreOffice, web application, mobile phone, tablet, Chromebook and desktop (Windows, macOS, Linux)<ref>{{cite journal|last1=Bärwaldt|first1=Eric|date=2020-09-01|title=Working Together Tools for collaborative office work|url=https://www.linux-magazine.com/Issues/2020/238/Collabora-and-OnlyOffice/(language)/eng-US|journal=Linux Magazine|volume=|issue=238/2020|pages=|quote=For cross-platform use, the suite not only supports the Open Document Format (ODF) but also all newer Microsoft formats, which makes interaction with other office suites easier.|via=}}</ref>
* [[LibreOffice]] – the cross platform office productivity suite from [[The Document Foundation]] (TDF) consists of programs for word processing, spreadsheets, presentation, diagrams and drawings, databases, etc.
* [[OnlyOffice#Desktop editors|OnlyOffice Desktop Editors]] – offline edition of the Cloud

==PDF editors==
* [[PDFsam]] Basic edition – platform independent software designed to split, merge, mix, extract pages and rotate PDF files for Windows, Linux, MacOS. Open-source version of their commercial offering

==Operating systems==
Be advised that available distributions of these systems can contain, or offer to build and install, added software that is neither free software nor open-source.
{{Main category|Free software operating systems}}

* [[Berkeley Software Distribution|BSD]] – [[FreeBSD]], [[OpenBSD]], [[NetBSD]], [[GhostBSD]], [[TrueNAS]], [[MidnightBSD]], [[DragonFly BSD]], [[OPNsense]], [[pfSense]], [[XigmaNAS]], among others. 
* [[GrapheneOS]]
* [[Kali NetHunter]]
* [[Linux]] – [[Debian]], [[Ubuntu]], [[Manjaro]], [[Fedora Linux|Fedora]], [[openSUSE]], [[antiX]], [[NixOS]], [[Kali Linux|Kali]], [[Alpine Linux|Alpine]], [[Tails (operating system)|Tails]], [[Mageia]], [[Slackware]], [[Gentoo Linux|Gentoo]], [[BlackArch]], among others ([[List of Linux distributions]]). 
* [[LineageOS]] – [[Android (operating system)|android]]-based operative system for tablets and mobile phones
* [[GNU Hurd]]
* [[Mobian]]
* [[Plasma Mobile]]
* [[PostmarketOS]]
* [[PureOS]]
* [[Ubuntu Touch]]
* [[Redox (operating system)|Redox OS]]
* [[FreeDOS]] – OS compatible with [[IBM PC DOS]] and [[Microsoft]]'s [[MS-DOS]]
* [[ReactOS]] – OS intended to run the same software as Windows, originally designed to simulate Windows NT 4.0, later aiming at Windows 7 compatibility. It has been in the [[development stage]] since 1996.

===Emulation and Virtualization===
{{Main category|Free emulation software}}
{{Main category|Free virtualization software}}
* [[AppleWin]]
* [[DOSBox]] – [[DOS]] programs emulator (including PC games)
* [[GNOME Boxes]]
* [[Hercules (emulator)]]
* [[Kernel-based Virtual Machine]]
* [[QEMU]]
* [[VirtualBox]] – [[Hypervisor#Classification|hosted]] [[hypervisor]] for [[x86 virtualization]]

==Personal information managers==
* [[Chandler (software)|Chandler]] – developed by the [[Open Source Applications Foundation]] (OSAF)
* [[KAddressBook]]
* [[Kontact]]
* [[KOrganizer]]
* [[Mozilla Calendar]] – [[Mozilla]]-based, multi-platform calendar program
* [[GNOME Evolution]]
* [[Perkeep]] – personal data store for pictures
* [[Project.net]] – commercial project management
* [[TeamLab]] – platform for project management and collaboration

==Programming language support==
{{See also|Comparison of integrated development environments}}
===Programming languages===
{{See also|List of open-source programming languages|List of open source code libraries|List of JVM languages}}
{{col-begin|width=80%}}
{{col-2}}
* [[Ada (programming language)|Ada]]
* [[Bash (Unix shell)|Bash]]
* [[C (programming language)|C]]
* [[C Sharp (programming language)|C#]]
* [[C++]]
* [[Carbon (programming language)]]
* [[Chapel (programming language)|Chapel]]
* [[Clojure]]
* [[Crystal (programming language)|Crystal]]
* [[D (programming language)|D]]
* [[Dart (programming language)|Dart]]
* [[Elixir (programming language)|Elixir]]
* [[Erlang (programming language)|Erlang]]
* [[F Sharp (programming language)|F#]]
* [[GNU awk]]
* [[GNU Fortran]]
{{col-2}}
* [[Gleam (programming language)|Gleam]]
* [[Go (programming language)|Go]]
* [[Hack (programming language)|Hack]]
* [[Haskell]]
* [[IDL (programming language)|IDL]]
* [[J (programming language)|J]]
* [[Java (programming language)|Java]]
* [[JavaScript]]
* [[Julia (programming language)|Julia]]
* [[Kotlin (programming language)|Kotlin]]
* [[Lua (programming language)|Lua]]
* [[Marlin (firmware)|Marlin]]
* [[ML (programming language)|ML]]
* [[Nim (programming language)|Nim]]
* [[OCaml]]
* [[Perl]]
{{col-2}}
* [[PHP]]
* [[Prolog]]
* [[Python (programming language)|Python]]
* [[R (programming language)|R]]
* [[Racket (programming language)|Racket]]
* [[Ruby (programming language)|Ruby]]
* [[Rust (programming language)|Rust]]
* [[Scala (programming language)|Scala]]
* [[Shell script|Shell]]
* [[SQL]]
* [[Swift (programming language)|Swift]]
* [[Tcl]]
* [[TypeScript]]
* [[V (programming language)|V]]
* [[Zig (programming language)|Zig]]
{{col-end}}

===Source code editors===
{{See also|Source-code editor|Comparison of integrated development environments|List of text editors|Online integrated development environment}}
{{col-begin|width=80%}}
{{col-2}}
* [[Acme (Plan 9)|Acme]]
* [[Arachnophilia]]
* [[Atom (text editor)|Atom]]
* [[Bluefish (software)|Bluefish]]
* [[Brackets (text editor)|Brackets]]
* [[Edinburgh Compatible Context Editor|ECCE]]
* [[ed (software)|ed]]
* [[Elvis (text editor)|Elvis]]
* [[Emacs|GNU Emacs]]
* [[Extensible Versatile Editor|Extensible Versatile Editor (EVE)]]
* [[FeatherPad]]
* [[Geany]]
* [[gedit]]
* [[GNOME Text Editor]]
* [[JED (text editor)|JED]]
{{col-2}}
* [[jEdit]]
* [[JOVE]]
* [[Project Jupyter#Jupyter Notebook|Jupyter Notebook]]
* [[Kate (text editor)|Kate]]
* [[Kile]]
* [[Komodo Edit]]
* [[KWrite]]
* [[Lapis (text editor)|Lapis]]
* [[Language-Sensitive Editor|Language-Sensitive Editor (LSE)]]
* [[Leo (text editor)|Leo]]
* [[Light Table (software)|Light Table]]
* [[MicroEMACS]]
* [[Nano (text editor)|GNU nano]]
* [[Neovim]]
{{col-2}}
* [[Notepad++]]
* [[nvi]]
* [[SciTE]]
* [[Stevie (text editor)|Stevie]]
* [[Textadept]]
* [[TextMate]]
* [[Vi (text editor)|Vi]]
* [[Vile (text editor)|vile]]
* [[Vim (text editor)|vim]]
* [[Visual Studio Code]]
* [[Xed]]
* [[XEmacs]]
* [[Zed (text editor)|Zed]]
{{col-end}}

===Compilers and assemblers===
{{See also|Compiler|Assembly language#Assembler|l2=Assembler|Interpreter (computing)|l3=Interpreter|List of compilers}}
{{col-begin|width=80%}}
{{col-2}}
* [[Amsterdam Compiler Kit]]
* [[BBC BASIC]]
* [[Bigloo]]
* [[Blitz BASIC]]
* [[BDS C]]
* [[CINT]]
* [[Chez Scheme]]
* [[Chicken (Scheme implementation)|Chicken]]
* [[Clang]]
* [[Clozure CL]]
* [[CMU Common Lisp]]
* [[Cython]]
* [[EiffelStudio]]
* [[Embeddable Common Lisp]]
* [[FASM]]
* [[Free Pascal]]
* [[FreeBASIC]]
* [[G95]]
* [[Gambas]]
* [[Gambit (Scheme implementation)|Gambit]]
* [[GNU Assembler]]
* [[GNU Compiler Collection|GCC]]
* [[GNU Compiler for Java]]
* [[GNU Common Lisp]]
* [[GNU Fortran]]
{{col-2}}
* [[GNU Pascal]]
* [[GNU Smalltalk]]
* [[Glasgow Haskell Compiler|Glasgow Haskell]]
* [[High Level Assembly]]
* [[IL2CPU]]
* [[Ikarus (Scheme implementation)|Ikarus]]
* [[IronRuby]]
* [[javac]]
* [[Jikes]]
* [[Kawa (Scheme implementation)|Kawa]]
* [[LCC (compiler)|LCC]]
* [[LibertyEiffel]]
* [[LLVM]]
* [[MIT/GNU Scheme]]
* [[Mono (software)#Mono-specific innovations|Mono compiler]]
* [[Netwide Assembler]]
* [[Nuitka]]
* [[Numba]]
* [[Open64]]
* [[PeachPie]]
* [[Phalanger (compiler)|Phalanger]]
* [[Portable C Compiler|Portable C]]
* [[Psyco]]
* [[QB64]]
* [[ROSE (compiler framework)|ROSE]]
{{col-2}}
* [[Roslyn (compiler)|Roslyn]]
* [[Rust (programming language)#Compiler|rustc]]
* [[SCM (Scheme implementation)|SCM]]
* [[Shed Skin]]
* [[Small-C]]
* [[Small Device C Compiler|Small Device C]]
* [[SmartEiffel]]
* [[Stalin (Scheme implementation)|Stalin]]
* [[Steel Bank Common Lisp]]
* [[TenDRA Compiler|TenDRA]]
* [[Tiny C Compiler|Tiny C]]
* [[Vector Pascal]]
* [[Watcom C/C++]]
* [[XPL]]
* [[YARV]]
* [[Yabasic]]
* [[York Haskell Compiler|York Haskell]]
* [[Zig (programming language)#Compiler|Zig Compiler]]
{{col-end}}

===Bug trackers===
* [[Bugzilla]]
* [[Mantis Bugtracker|Mantis]]
* [[Mindquarry]]
* [[Redmine]]
* [[Trac]]

===Code generators===
* [[Babel (transcompiler)|Babel]] – [[JavaScript]] [[transcompiler]]
* [[GNU bison|Bison]]
* [[CodeSynthesis XSD]] – [[XML Data Binding]] compiler for C++
* [[CodeSynthesis XSD/e]] – validating XML parser/serializer and C++ [[XML Data Binding]] generator for mobile and embedded systems
* [[Flex lexical analyser]] – generates lexical analyzers
* [[Open Scene Graph]] – 3D graphics application programming interface
* [[OpenSCDP]] – Open Smart Card Development Platform
* [[SableCC]] – parser generator for Java and [[.NET]]
* [[SWIG]] – Simplified Wrapper and Interface Generator for several languages
* [[xmlbeansxx]] – [[XML Data Binding]] code generator for C++
* [[YAKINDU Statechart Tools]] – Statechart code generator for C++ and Java

===Documentation generators===
* [[Doxygen]] – tool for writing software reference documentation. The documentation is written within code
* [[Mkd (software)|Mkd]] – extracts software documentation from [[source code]] files, [[pseudocode]], or [[Comment (computer programming)|comments]]
* [[Natural Docs]]

===Configuration software===
* [[Autoconf]]
* [[Automake]]
* [[CMake]]

===Debuggers (for testing and trouble-shooting)===
* [[GNU Debugger]] – portable [[debugger]] that runs on many [[Unix-like]] systems
* [[Memtest86]] – stress-tests [[random access memory|RAM]] on [[x86]] machines
* [[Xnee]] – record and replay tests

===Integrated development environments===
{{Main category|Free integrated development environments}}

===Version control systems===
{{Main category|Free version control software}}

==Reference management software==
{{See also|Comparison of reference management software}}

== Risk management ==
* [[Active Agenda]] – [[operational risk management]] and [[rapid application development]] platform

==Science==
{{Main category|Free science software}}

=== Bioinformatics ===
{{See also|List of open-source bioinformatics software}}
{{col-begin|width=65%}}
{{col-2}}
* [[AMAP]]
* [[BAli-Phy]]
* [[BLAST (biotechnology)|BLAST]], [[CS-BLAST]], [[BLAT (bioinformatics)|BLAT]]
* [[Bowtie (sequence analysis)|Bowtie ]]
* [[Clustal]]
* [[DECIPHER (software)|DECIPHER]]
* [[FASTA]]
* [[Fast statistical alignment]]
* [[HMMER]]
* [[HH-suite]]
* [[JAligner]]
{{col-2}}
* [[MAFFT]]
* [[MAVID]]
* [[MUSCLE (alignment software)|MUSCLE]]
* [[Nextflow]]
* [[Phyloscan]]
* [[Probalign]]
* [[ProbCons]]
* [[Stemloc]]
* [[T-Coffee]]
* [[UGENE]]
* [[Yass (software)|Yass]]
{{col-end}}

=== Cheminformatics ===
* [[Chemistry Development Kit]]
* [[JOELib]]
* [[OpenBabel]]

===Data science===
{{See also|List of R software and tools|List of SQL software and tools|List of NoSQL software and tools|List of data science software}}
* [[Apache Flink]] – stream and batch data processing framework
* [[Apache Hadoop]] – distributed storage and processing framework
* [[Apache Mahout]] – scalable machine learning library
* [[Apache Spark]] – unified analytics engine
* [[Dask (software)|Dask]] – parallel computing for analytics in Python
* [[ELKI]] – data analysis algorithms library
* [[GNU Octave]] – numerical computing environment
* [[JASP]] – [[GUI]] program for data analytics, data science, and machine learning
* [[Jupyter Notebook]] – interactive computing
* [[Keras]] – neural network library
* [[KNIME]] – data analytics platform
* [[Matplotlib]] – data visualization library
* [[Apache Spark#MLlib machine learning library|MLlib]] – machine learning library for [[Apache Spark]]
* [[NumPy]] – numerical computing library
* [[Orange (software)|Orange]] – data mining tool
* [[Pandas (software)|pandas]] – data manipulation library
* [[PyTorch]] – machine learning and deep learning framework
* [[Python (programming language)|Python]]
* [[R (programming language)|R]] – statistical computing language
* [[SageMath]] – mathematics and data analysis environment
* [[SciPy]] – scientific computing library
* [[scikit-learn]] – Python [[machine learning]] library
* [[TensorFlow]] – machine learning framework
* [[Weka (software)|WEKA]] – machine learning and data analysis suite

=== Electronic lab notebooks ===
* [[Project Jupyter|Jupyter]]

=== Geographic information systems ===
{{Main category|Free GIS software}}

=== Geoscience ===
{{See also|List of free geology software|}}

=== Grid computing ===

=== Microscope image processing ===
* [[CellProfiler]] – automatic microscopic analysis, aimed at individuals lacking training in [[computer vision]]
* [[Endrov]] – Java-based plugin architecture designed to analyse complex spatio-temporal image data
* [[Fiji (software)|Fiji]] – [[imageJ]]-based image processing
* [[Ilastik]] – image-classification and segmentation software
* [[ImageJ]] – image processing application developed at the [[National Institutes of Health]]
* [[IMOD (software)|IMOD]] – 2D and 3D analysis of electron microscopy data
* [[Insight Segmentation and Registration Toolkit|ITK]] – development framework used for creation of image segmentation and registration programs
* [[KNIME]] – data analytics, reporting, and integration platform
* [[VTK]] – C++ toolkit for 3D computer graphics, image processing, and visualisation
* [[3DSlicer]] – medical image analysis and visualisation

===Molecular design software===
{{See also|Molecular design software}}
* [[Ascalaph Designer]]
* [[Winmostar]]

=== Molecular dynamics ===
* [[GROMACS]] – protein, lipid, and nucleic acid simulation
* [[LAMMPS]] – molecular dynamics software
* [[MDynaMix]] – general-purpose molecular dynamics, simulating mixtures of molecules
* [[ms2 (software)|ms2]] – molecular dynamics and Monte Carlo simulation package to predict thermophysical properties of fluids
* [[NWChem]] – wuantum chemical and molecular dynamics software

===Molecule editors===
{{See also|Molecule editor|l1=Molecule editors}}
* [[Ascalaph Designer]]
* [[Avogadro (software)|Avogadro]]
* [[Gabedit]]
* [[JChemPaint]]
* [[Kekulé Program]]
* [[XDrawChem]]

===Molecular graphics systems===
{{See also|List of molecular graphics systems}}
* [[Avogadro (software)|Avogadro]]
* [[BALL]]
* [[Gabedit]]
* [[Jmol]]
* [[Molekel]]
* [[PyMOL]]
* [[RasMol]]

===Molecular mechanics modeling===
{{See also|Comparison of software for molecular mechanics modeling}}
* [[Avogadro (software)|Avogadro]]
* [[CP2K]]
* [[GROMACS]]
* [[LAMMPS]]
* [[MDynaMix]]
* [[ms2 (software)|ms2]]
* [[OpenMM]]
* [[Orac (MD program)|Orac]]
* [[NWChem]]
* [[Q (software)|Q]]
* [[Quantum ESPRESSO]]

=== [[Molecular structure]] ===
{{See also|List of TeX extensions}}
* [[Chemfig]]
* [[JChemPaint]]
* [[XDrawChem]]
* [[XyMTeX]]

=== Molecule viewer ===
* [[Avogadro (software)|Avogadro]] – plugin-extensible molecule visualisation
* [[BALLView]] – molecular modeling and visualisation
* [[Jmol]] – 3D representation of molecules in many formats, for teaching use
* [[Molekel]] – molecule viewing software
* [[MeshLab]] – able to import PDB dataset and build up surfaces from them
* [[PyMOL]] – high-quality representations of small molecules and biological macromolecules
* [[QuteMol]] – interactive molecule representations offering an array of innovative OpenGL visual effects
* [[RasMol]] – visualizes biological macromolecules

=== Nanotechnology ===
* [[nanoHUB]]
* [[Ninithi]] – visualise and analyse carbon allotropes, such as [[carbon nanotube]], [[Fullerene]], [[graphene nanoribbon]]s

===Nuclear Fusion Engineering===
* [[OpenMC]]

=== Plotting ===
{{Main category|Free plotting software}}
* [[Veusz]]

===Quantum chemistry===
{{See also|List of quantum chemistry and solid-state physics software}}
* [[CP2K]] – atomistic and molecular simulation of solid-state, liquid, molecular, and biological systems

== Screensavers ==
* [[BOINC]]
* [[Electric Sheep]]
* [[XScreenSaver]]

==Simulation software==
* [[List of computer simulation software#Free or open-source|List of free and open source simulation software]]

==Statistics==
{{Main category|Free statistical software}}
* [[R (programming language)|R]] – statistics software
* [[LimeSurvey]] – online survey system

==Theology==
===Bible study tools===
* [[Go Bible]] – free Bible viewer application for Java [[mobile phone]]s
* [[Marcion (software)|Marcion]] – [[Coptic language|Coptic]]–[[English language|English]]/[[Czech language|Czech]] [[dictionary]]
* [[OpenLP]] – [[worship presentation program]] licensed under the [[GNU General Public License]]
* [[The SWORD Project]] – CrossWire Bible Society's free software project

==Typesetting==
{{Main category|Free typesetting software}}

== Web conferencing ==
{{Main article|Web conferencing}}
{{See also|Comparison of web conferencing software}}

* [[Jitsi|Jitsi Meet]]
* [[OpenMeetings]]
* [[Conference XP]]
* [[Jami (software)|Jami]]
* [[BigBlueButton]]

==See also==
{{Portal|Free and open-source software}}
* [[Open-source software]]
* [[Open-source license]]
* {{section link|Comparison of file synchronization software|Open-source}}
* {{section link|List of HDL simulators|Free and open-source simulators}}
* {{section link|List of optimization software|Free and open-source software}}
* {{section link|List of concept- and mind-mapping software|Free and open-source}}
* {{section link|List of spreadsheet software|Free and open-source software}}
* {{section link|Comparison of FTP client software|Free and open-source software}}
* [[GNOME Core Applications]]
* [[List of GNU packages]]
* [[List of KDE applications]]
* [[List of formerly proprietary software]]
* [[List of Unix commands]]
* [[List of open-source hardware projects]]

===General directories===
* [[AlternativeTo]]
* [[CodePlex]]
* [[Free Software Directory]]
* [[Freecode]]
* [[Open Hub]]
* [[SourceForge]]

===Open-source organizations===
{{Main|List of free and open-source software organizations}}
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2">
* [[AlmaLinux|AlmaLinux OS Foundation]]
* [[Apache Software Foundation]]
* [[Blender Foundation]]
* [[Center for Open Science]]
* [[Cloud Native Computing Foundation]]
* [[Debian]]
* [[Eclipse Foundation]]
* [[FLISOL]]
* [[FreeBSD Foundation]]
* [[Free Software Foundation]]
* [[Free Software Foundation Europe]]
* [[GNOME Foundation]]
* [[Jasig]]
* [[KDE e.V.]]
* [[Khronos Group]]
* [[Linux Australia]]
* [[Linux Foundation]]
* [[Lyrasis]]
* [[MariaDB#MariaDB Foundation|MariaDB Foundation]]
* [[Mozilla Foundation]]
* [[NetBSD#NetBSD Foundation|NetBSD Foundation]]
* [[.NET Foundation]]
* [[Open Compute Project]]
* [[OpenForum Europe]]
* [[OpenJS Foundation]]
* [[Open Source Geospatial Foundation]]
* [[Open Source Hardware Association]]
* [[Open Source Initiative]]
* [[OpenStack]]
* [[OW2]]
* [[Perl Foundation]]
* [[Python Software Foundation]]
* [[R Foundation#Community|R Foundation]]
* [[Red Hat]]
* [[Rust Foundation]]
* [[Software Freedom Conservancy]]
* [[Software in the Public Interest]]
* [[The Document Foundation]]
* [[Wikimedia Foundation]]
* [[WordPress#WordPress Foundation|WordPress Foundation]]
* [[X.Org Foundation]]
</div>

==References==
{{Reflist}}

==External links==
* [https://opensourcesoftwaredirectory.com/ Open Source Software Directory (OSSD)], a set of [[free and open-source software|FOSS]] organized by [[target audience]]
* [https://help.ubuntu.com/community/ListOfOpenSourcePrograms List of open-source programs (LOOP) for Windows], maintained by the [[Ubuntu]] Documentation Project
* [https://bartvandewoestyne.github.io/osswin/ The OSSwin Project], a list of [[free and open-source software]] for Windows
* [https://www.apache.org/index.html#projects-list Apache Project List]
* [https://projects.apache.org/ Apache Projects Directory]
* [https://www.gnu.org/software/ Software – GNU Project – Free Software Foundation]
* [[freesoft:Main_Page|Free Software Directory]]

{{FOSS}}

{{DEFAULTSORT:Open Source Software Packages}}
[[Category:Free software lists and comparisons]]
[[Category:Lists of software]]
[[Category:Software licensing|*]]