Bandcamp - Discover amazing music and directly support the artists who make it.
Recast - Listen to radio stations' playlists with Rdio or Spotify
SoundCloud - Enjoy music & follow favourite artists
RadioCut - All the radio to rewind, listen and share
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Radiojar - Social web radio made easy