Pyro - Spotify music voting for parties
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
klaep - music collaboration - klaep is a social music collaboration network for musicians
Heartbeat - Listen to music with your friends together, on Spotify
MisterJack - Make and share playlists
Join My Playlist - Listen to music live together with your friends in Spotify.