Playlist Machinery - Tools that help you create & organize your Spotify playlists
Pattern Monster - Pattern Monster is a pattern maker app to create vector patterns for your projects
Playlistor - Convert Apple Music playlists to Spotify and vice versa
PatternPad - Create beautiful geometric patterns
playAppleMusic.com - An (unofficial) web player for Apple Music
SVG Stripe Generator - SVG Stripe Generator is an easy-to-use tool that enables you to create unlimited stripes and then download them to the device.