Pyro - Spotify music voting for parties
Visualify - Visualize your top artists on Spotify
Playlistful - Collaborative playlists for parties!
SYQEL - Bring your music to life
klaep - music collaboration - klaep is a social music collaboration network for musicians
Kaleidosync - Kaleidosync is an all-in-one Spotify music visualizer that is all set to deliver a top-notch music experience with real-time support.