Kodi (formerly known as XBMC) is a multimedia center suitable to build home-theater PCs (HTPCs). Kodi contains special support for the RPi hardware but it has to be enabled during compilation. RPiBuntu provides such a special build and the necessary dependencies.

You can install kodi with apt-get install kodi. If you want to start kodi at startup automatically, install kodi-desktop. This installs additional dependencies, e.g., upower in order to shut the RPi down from the Kodi menu.