Jukebox - Collaborative music player
Playlist Machinery - Tools that help you create & organize your Spotify playlists
OutLoud Social Jukebox - Control the music with your friends in real-time
BeatMix - Enables Shuffle and Radio for multiple artists in Spotify
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
Magic Playlist - Get the playlist of your dreams based on a song