Openwhyd - Collect and Share the tracks you love.
MusicDB - MusicDB is a music manager, server and player that focus on music.
SoundClick - SoundClick is a music-based social community.
Gonic - music streaming server / free-software subsonic server API implementation - sentriz/gonic
Music Smasher - Find any song. Music Smasher searches Spotify, Rdio, SoundCloud, Bandcamp, and YouTube.
Swing Music - Beautiful and fast music streaming server.