Your 2017 Wrapped by Spotify - Relive all the music you discovered and loved in 2017.
Magic Playlist - Get the playlist of your dreams based on a song
SpotMenu - Spotify and iTunes in your macOS menu bar
Spotalike - Spotify playlist with similar songs, according to Last.fm
Spotify Taste Rewind - What your music taste would have been like in past decades
Playlist Machinery - Tools that help you create & organize your Spotify playlists