Chrome Music Lab:
https://musiclab.chromeexperiments.com/Experiments
Muted.IO List of Music Apps:
Large Selection of Music Apps:
https://www.symbaloo.com/embed/music288?
Coding Train by Dan Shiffman for P5 Tutorials. Note I teach the Code! class at NYU, if you are looking to get more up to speed with P5, I would highly recommend that you check out Code! at Coding Train.
Cheatsheet on P5 that I like from Antonio Belluscio and Ben Moren: