Coding
Code.org
Scratch from MIT
Free Code Camp
Code Combat
Code HS
MIT App Inventor 2
Music Composition
Noteflight
Compose through coding with Scratch from MIT
Recording
Audacity
Soundation
Twisted Wave
Recordable Keyboard
Soundplant
Games & more!
Incredibox
ujam
audiotool.com
NY Philharmonic
http://interactivesites.weebly.com/music.html