Openwhyd - Collect and Share the tracks you love.
Tunit.fm - the largest FREE music listening platform on the planet.
SoundClick - SoundClick is a music-based social community.
Tenory - Social community for discovering and sharing everything about music.
Music Smasher - Find any song. Music Smasher searches Spotify, Rdio, SoundCloud, Bandcamp, and YouTube.
Bandcamp - Discover amazing music and directly support the artists who make it.