Infuse - Media player and media server with subtitles and wide codec support.

Screeninvader - Linux Distro for collective Youtube/Soundcloud DJing via Webinterface

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.

Kodi - Kodi is an award winning free and open source media player that got its start on the Xbox console.

Oblecto - Oblecto is a frontend agnostic media butler bringing high performance high quality media streaming...

Serviio - Web on Big Screen. Serviio enables playback of online sources like RSS feeds, live streams or web site content so that you can listen to your favourite podcasts or watch latest TV programmes published online.