Kodi (formerly known as «XBMC», or «Xbox Media Center») is an award-winning open source media center for playing videos, music, pictures, games, and more. Licensed as free software, under the GNU General Public License (GPL), it runs on Linux, OS X, Windows, iOS, and Android.
Kodi features a «10-foot user interface» (that is, a UI suitable for televisions, where the user is 10' away from the screen, and using a hand-held remote control), and can play digital content from local and network storage, as well as streamed from the Internet. It supports live TV, and can act as a Personal Video Recorder (PVR). It supports 'skins', allowing the entire UI to be customized, and 'add-ons' to give Kodi additional functionality (e.g., controlling the lights in your house).
Universal Plug and Play (UPnP) support lets Kodi instances stream to each other, and other devices. Along with real remote controls, and iOS and Android remote apps for phones and tablets, Kodi can also be controlled programmatically, via a web interface!
Kodi began as XBMC, the Xbox Media Center, for the original Microsfot Xbox game console, but has since been ported to a variety of platforms, and in 2014 the software was renamed to Kodi. A stand-alone Linux distribution «Kodibuntu» (based on Ubuntu) is available, and a number of commercially sold stand-alone devices running XBMC & Kodi have been made.