HotMusic - HotMusic is the best music service to discover songs from your favourite genres RIGHT AFTER their...
Momixa - Pick two songs and get the perfect mix
Spotify - Map shows when two people play same song at same time
FIEND.fm - "Hot or Not" for music discovery: 2 hrs of tracks in 2 mins
Jams On Toast - Delightful iOS music player, handcrafted for album lovers
Pacemaker - Create and share mixtapes with friends