XBMC (standing for XBOX Media Center) has been a popular media app for years. Originally designed to work on the first XBOX through some hacky tricks, it has also been available as a media center solution for various computer platforms and also as a packaged standalone solution known as XBMCBuntu, running on a version of Ubuntu Linux. I use the latter on an old PC, and it gives a pretty slick Roku-like system.
Moving away from it's XBOX roots, the XBMC team is rebranding as Kodi Entertainment Center.
EngadgetThe developers now have control over their trademark, and the move should prevent trouble with "other companies" -- no doubt including Microsoft -- that might send lawyers after fans or the XBMC team itself. The first Kodi release is a rough alpha, so don't expect to see the new name everywhere just yet. However, it shouldn't be long before the XBMC badging is consigned to the history books.