Playlist Machinery - Tools that help you create & organize your Spotify playlists
Lazyset - A Spotify playlist mixing Facebook Messenger bot
Playlistor - Convert Apple Music playlists to Spotify and vice versa
Tablecruncher - This lightweight, yet powerful CSV editor for Apple Mac helps you crunch all your tabular data.
playAppleMusic.com - An (unofficial) web player for Apple Music
Tad - Create sleeve and cover art for your band in minutes