PeekaBeat - Turn your selfie into Spotify playlist 🎶
Parallel - Listen to music with friends over Spotify at the same time
Party Blends - A way to blend your friends favourite tracks into one Spotify playlist.
Join My Playlist - Listen to music live together with your friends in Spotify.
Slackbox - Spotify playlist collaboration through Slack
TuneMeet - Chat with people who are listening to the same song