Geniuslink - Build intelligent links that automatically route consumers to the place they're most likely to...
Slackbox - Spotify playlist collaboration through Slack
Coverify - Create your own custom cover art for Spotify playlists.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Replace Cover - Create beautiful cover art for your Spotify playlists
Exportify - Export your playlists from Spotify