FIEND.fm - "Hot or Not" for music discovery: 2 hrs of tracks in 2 mins
Spotify - Map shows when two people play same song at same time
Pacemaker - Create and share mixtapes with friends
SoundCloud - Enjoy music & follow favourite artists
Boil the Frog - Create a seamless playlist between any two artists
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.