Playlist Machinery - Tools that help you create & organize your Spotify playlists
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
TrackStack - Easy Spotify playlist sharing and collaboration
üWave - üWave is a self-hosted collaborative listening platform.
BeatMix - Enables Shuffle and Radio for multiple artists in Spotify
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).