Playlist Machinery - Tools that help you create & organize your Spotify playlists
Musish - A web client for Apple Music
Playlistor - Convert Apple Music playlists to Spotify and vice versa
Apple Music Web App - Apple Music is now available to stream on the web
2021 Year in Review Workbook - Before you start planning out where you’re going, you have to know where you’ve been.
feverTunes - A web player for Apple Music support adding tags to playlist