PeekaBeat - Turn your selfie into Spotify playlist 🎶
PlaylistMap - Connect with Spotify playlist curators from around the world
Morse - Create, shout out, and discover nearby events in real time
Undrtone - Social layer on top of Spotify and Rdio from Scott Vener
Courseroot - Biggest online course database on the web
SoundCloud Charts - The most played tracks on SoundCloud this week