DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
Openwhyd - Collect and Share the tracks you love.
Spotify - Map shows when two people play same song at same time
SoundClick - SoundClick is a music-based social community.
SoundCloud - Enjoy music & follow favourite artists
Zoff - Collaborate on a live music and video playlist with your friends.