Magic Playlist - Get the playlist of your dreams based on a song
CueBot - A better way to request for songs at a party 🎉
Spotalike - Spotify playlist with similar songs, according to Last.fm
cueued - A service to demauxratize your Spotify music
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Lazyset - A Spotify playlist mixing Facebook Messenger bot