BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
aux.app - A free web-based music platform to play music from other popular online streaming services.
Quorus - A new way to listen to music through collaboration
Partyhero - Pass your friends the aux!
Twinjack - Stream Spotify music with anyone with just a link
Slackbox - Spotify playlist collaboration through Slack