Join My Playlist - Listen to music live together with your friends in Spotify.
MusicButler - Get notified when your favourite artists release new music
Parallel - Listen to music with friends over Spotify at the same time
Tracknack - Tracknack uses album credits to find new music you care about and updates a Spotify playlist for you automatically.
TuneMeet - Chat with people who are listening to the same song
Album Tracker - Album Tracker automatically scans the song that is playing on your computer then shows you the...