Playlist Machinery - Tools that help you create & organize your Spotify playlists
Audius - The future of music streaming on the blockchain
Playlistor - Convert Apple Music playlists to Spotify and vice versa
Colibri Lossless - A native audio player for macOS built from scratch using the award-winning BASS audio engine.
FreeYourMusic - Migrate from and to any music services
TAPESTREA - TAPESTREA is a unified framework for interactively analyzing, transforming, and synthesizing complex sounds.