BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
humit - A social networking app for music sharing and discovery.
20v - Create a custom music channel based on a single song
Songlink - Share music with anyone.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Son.gg in Slack - Share music with your team in Slack