Subsonic - Subsonic is a free, web-based media streamer, providing ubiquitous access to your music and video.
Jukebox - Collaborative music player
CherryMusic - A music streaming server written in python:Stream your own music collection to all your devices!
Juicebox - Spectacular HTML5 Image Galleries Made Easy
Ampache - Web ( HTTP centralized ) based audio/video streaming application
ShareTube - Watch YouTube, synced with friends.