Soundlove.io - Choose and mix from 100+ high-quality sounds and noises to improve focus or relax.
Magic Playlist - Get the playlist of your dreams based on a song
Brain.fm - Music designed for the brain to enhance focus, relaxation, meditation, naps and sleep within 10 - 15 minutes of use.
Spotalike - Spotify playlist with similar songs, according to Last.fm
Can't Sleep - AI music scientifically designed for sleep
Playlist Machinery - Tools that help you create & organize your Spotify playlists