Magic Playlist - Get the playlist of your dreams based on a song
Pocket Operator Modular System - A modular and affordable synthesizer 🎛️
Spotalike - Spotify playlist with similar songs, according to Last.fm
Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
Playlist Machinery - Tools that help you create & organize your Spotify playlists
SonicRoad - Discover great music faster than ever before