Lazyset - A Spotify playlist mixing Facebook Messenger bot
Magic Playlist - Get the playlist of your dreams based on a song
DiscVibe - Create personalized and contextualized Spotify playlists
Spotalike - Spotify playlist with similar songs, according to Last.fm
PeekaBeat - Turn your selfie into Spotify playlist 🎶
Playlist Machinery - Tools that help you create & organize your Spotify playlists