Apple Music Web App - Apple Music is now available to stream on the web
Violin by Trala - Violin by Trala is a music learning app that is designed specifically for Violin users.
Musish - A web client for Apple Music
Metronaut - An app to help you play classical music
playAppleMusic.com - An (unofficial) web player for Apple Music
Piano2Notes - Piano2Notes is a web application and mobile that transcribes your piano tune into a digital word document.