Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.
Screeninvader - Linux Distro for collective Youtube/Soundcloud DJing via Webinterface
Android TV - Android TV is a version of Android made for TV's
Universal Media Server - Universal Media Server allows you to host your entire library of video, music, and pictures, and broadcast them conveniently to a wide variety of different devices.
PseudoTV - PseudoTV Live is channel-surfing for your media center.
Stremio - Watch videos, movies, TV series and TV channels instantly.