https://github.com/Oluchukwu96/Kinematic-Simulator
The downloadable code is nearly all Javascript. Basic and very pretty javascript code running on a Canvas. Did not see much physics.
Did not see any licensing information.

PhET has simulation software, but only for Teachers. Seems to be free, with many packages. Hard to tell what it could be used for.
Saw their statement that for $100,000 they will work on a new package.

Working Model 2D looked professional, and pricey, with annual fees.

And while doing other searches, encountered some malware of some short. Seem to be pushing antivirus with popups. Hard to tell these days.

- Brian