Beatport - Beatport is an online music store specializing in electronic dance music and culture.
Spotify - Map shows when two people play same song at same time
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Publiseer - Publishing should be free and easy
SoundCloud - Enjoy music & follow favourite artists
Muslate - A Home of Indie Music : Listen, Organize & Share Your Music