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
SoundCloud - Enjoy music & follow favourite artists
Ampache - Web ( HTTP centralized ) based audio/video streaming application
TuneIn Radio - With TuneIn Radio Mobile, your mobile device becomes the radio.
Deezer - Deezer is a music streaming app created in France. It is available in 180 counties and gets 16 million users a month. 6 million of the users have paid subscriptions. Read more about Deezer.