Heartbeat - Listen to music with your friends together, on Spotify
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Twinjack - Stream Spotify music with anyone with just a link
üWave - üWave is a self-hosted collaborative listening platform.
Join My Playlist - Listen to music live together with your friends in Spotify.