Add-on

Software

• Plug-in (computing), a piece of software which enhances another software application and usually cannot be run independently.
  • Browser extension, which modifies the interface and/or behavior of web browsers
  • Add-on (Mozilla), a piece of software that enhances and customizes Mozilla-based applications
• Expansion pack, an add-on for a video game

Hardware

• Peripheral, an optional computer hardware component that supplements or enhances the functionality of the original unit
• Video game accessory, a piece of hardware used in conjunction with a video game console for playing video games

Other

• An extension to a house
• Addon, a person named in the Hebrew bible
• An adjuvant therapy, an add-on therapy to existing treatment

See also

• Plug-in (disambiguation)