Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Muru Music - Personalised playlists within seconds.
Heartbeat - Listen to music with your friends together, on Spotify
Playlist Machinery - Tools that help you create & organize your Spotify playlists
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Jukebox - Collaborative music player