RadioCut - All the radio to rewind, listen and share
Concertmaster - Classical music front-end for Spotify
Recast - Listen to radio stations' playlists with Rdio or Spotify
Music-Map - The Music-Map is the Tourist Map of Music, part of Gnod, the Global Network of Discovery.
Radiojar - Social web radio made easy
Poly-graph Hip Hop - See what hip hop's billboard top 10 sounded like