Spotify Taste Rewind - What your music taste would have been like in past decades
Magic Playlist - Get the playlist of your dreams based on a song
Top Products - Discover the top products of a day, month or year!
Spotalike - Spotify playlist with similar songs, according to Last.fm
Sundial - Timehop for music
Playlist Machinery - Tools that help you create & organize your Spotify playlists