Openwhyd - Collect and Share the tracks you love.
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Twinjack - Stream Spotify music with anyone with just a link
Spotify_cmd - Spotify_cmd is a tool to control a running instance of Spotify under wine.
Quorus - A new way to listen to music through collaboration
Spotibot - Spotibot uses the listening habits of millions of people to help you find your new favourites.