Your Time Capsule by Spotify - Throw it back with nostalgic tracks picked just for you.
Slackbox - Spotify playlist collaboration through Slack
Spotify.me - Beautiful analytics on your Spotify listening habits 🎧
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Spotify - Map shows when two people play same song at same time
Exportify - Export your playlists from Spotify