Playlist Machinery - Tools that help you create & organize your Spotify playlists
PeekaBeat - Turn your selfie into Spotify playlist 🎶
Poolside FM for Mac - An infinity pool of summer sounds in your Mac menu bar
Party Blends - A way to blend your friends favourite tracks into one Spotify playlist.
Listen for Mac - Add songs to Spotify playlists using keyboard shortcuts
Slackbox - Spotify playlist collaboration through Slack