BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Parallel - Listen to music with friends over Spotify at the same time
Twinjack - Stream Spotify music with anyone with just a link
Join My Playlist - Listen to music live together with your friends in Spotify.
Quorus - A new way to listen to music through collaboration
TuneMeet - Chat with people who are listening to the same song