Paul Falstad's Math and Physics Applets

I used to use the Java versions of these applets [1]. I'm glad and thankful he rewrote these in JavaScript but there are sadly so many great Java Applets I have come across (games, but especially STEM demos [2] [3]) and not to mention Flash-enabled sites that haven't gotten the same treatment.

IIRC there were some projects a few years back to "convert" SWF files to HTML5 + JS compatible source and assets but not so much for Java applets. I'm curious if something similar might exist or if any forward motion has gone into preserving such content.

[1] https://mrl.cs.nyu.edu/~perlin/

[2] https://mrl.cs.nyu.edu/~perlin/

[3] https://physlab.physics.ucdavis.edu/physlab/ph14e/index.html

These saved me during my undergrad in Physics. I used them constantly.

I reached out to him last year about 1. What was his GitHub (don't know why I had trouble finding it) and 2. Wondering if he had a "buymecoffee" link (he refused donations)

https://github.com/pfalstad?tab=repositories

To answer the first question I had, it's taking the applet code converting it into JS to run these.