Playlist Machinery - Tools that help you create & organize your Spotify playlists
Music Match - Find out how musically compatible you are with friends
Spotify.me - Beautiful analytics on your Spotify listening habits 🎧
Apple Music - Apple Music app combines your personal iTunes library with Apple's music subscription service. Music you have purchased from the iTunes store, or synced over from other sources, is available in the "Library" tab. Read more about Apple Music.
Magic Playlist - Get the playlist of your dreams based on a song
Annie Music - The easiest way to share good music