One of my personal projects: a full-blown Home Theatre PC / Media Center running on Linux.
Features: using my DVB-C Ziggo subscription, able to play, pause and record HD-streams. Play music and movies, from local harddisk, YouTube or Uitzendinggemist/RTLgemist. View images, browse the Internet, communicate via Skype. Play Linux games (incl. Steam) using a Logitech controller, or play WII games using Dolphin-emu and two original WII-controllers.
Technology: Gentoo Linux (considering Debian Testing), a Smargo smartcard reader and oscam card sharing software. A Digital Devices Cine C2 v6 TV-tuner card and TVHeadend software. And of course running Kodi.
Feel free to contact me for further information!