DistroKid - Unlimited uploads to iTunes and more. Keep 80-100% of your royalties.
Spotify - Map shows when two people play same song at same time
TuneCore - Music distribution platform for artists to sell their content worldwide
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
Ditto Music - Release your music online, set up a record label and keep 100% of royalties
SoundCloud - Enjoy music & follow favourite artists