Maeve - A customizable Apple Music web player with Last.fm support
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Concertino - A classical music 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
playAppleMusic.com - An (unofficial) web player for Apple Music