BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Quorus - A new way to listen to music through collaboration
Audioship - Upload audio to YouTube or Facebook