BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Bandcamp - Discover amazing music and directly support the artists who make it.
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).
SoundCloud - Enjoy music & follow favourite artists
Quorus - A new way to listen to music through collaboration
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.