Spotify - Map shows when two people play same song at same time
CLiGGO MUSIC - CLiGGO MUSIC provides free music enjoyment on your pc, smart phone or tablet.
SoundCloud - Enjoy music & follow favourite artists
Wonder.fm - Discover new music. New site by We Are Hunted co-founder.
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
avant.fm - Avant.fm provides a customizable, listenable feed of new releases from the best indie record labels, across all genres.