SOUNDS - Discover music with friends
Turntable.fm - Turntable.fm is a social media website developed by Billy Chasen and Seth Goldstein that allows the audience to stream their own music.
Spotify - Map shows when two people play same song at same time
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Songlink - Share music with anyone.
Audiu - Audiu is one of the largest platforms for the online music community, allowing users to collaborate, organize and publish their musical projects.