Spotify Taste Rewind - What your music taste would have been like in past decades
Slackbox - Spotify playlist collaboration through Slack
Apple Music Analyser - Missing year in review? Apple Music Rewind?
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Teleport Sundial - Your remote team's locations, time zones and availability
Exportify - Export your playlists from Spotify