FIEND.fm - "Hot or Not" for music discovery: 2 hrs of tracks in 2 mins
Heartbeat - Listen to music with your friends together, on Spotify
Pacemaker - Create and share mixtapes with friends
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Boil the Frog - Create a seamless playlist between any two artists
Join My Playlist - Listen to music live together with your friends in Spotify.