PRIZM - Intelligent music player that you can plug into any speakers
Magic Playlist - Get the playlist of your dreams based on a song
Spotalike - Spotify playlist with similar songs, according to Last.fm
Sweet Soundtrack - Find songs from your favorite movies 🎶
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Tycho Forecast - Turn your weather into a Spotify or Apple Music playlist