Noted - Social music discovery
Heartbeat - Listen to music with your friends together, on Spotify
OurMix - Music discovery powered by your friends
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Cymbal - Music discovery powered by friends
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!