Jukebox - Collaborative music player
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
OutLoud Social Jukebox - Control the music with your friends in real-time
JQBX - turntable.fm for spotify
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Partyhero - Pass your friends the aux!