Heartbeat - Listen to music with your friends together, on Spotify
Parallel - Listen to music with friends over Spotify at the same time
Liyo - Stream your favorite music live with friends 🎶
Slackbox - Spotify playlist collaboration through Slack
TuneMeet - Chat with people who are listening to the same song
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...