Subsonic - Subsonic is a free, web-based media streamer, providing ubiquitous access to your music and video.
SoundCloud - Enjoy music & follow favourite artists
CherryMusic - A music streaming server written in python:Stream your own music collection to all your devices!
Spotify - Map shows when two people play same song at same time
Ampache - Web ( HTTP centralized ) based audio/video streaming application
SoundClick - SoundClick is a music-based social community.