1. Geogebra, Physics interactive simulations
Thermodynamics Simulations, 1st Law
2. Thermodynamics Simulations, second Law
3. A collection of simulations about motion and collisions.
4. HTML5 physics Simulations
5. A collection of simulations by topic
6. Simulations by Ray Tuck
7. Physics Aviary, Labs
8. HTML5 Math Simulations
9. Physics geogebra simulations by Tom Walsh
10. Simulations bucket
11. P-V Diagram and Work
12. Electric Field Vector Field
13. Charged Particle in an Electric Field
14. Driven RLC Circuit Using Phasors
15. Geogebra simulations by Dave Nero
16. Kirchoff's circuit rules to a multi-loop circuit
17. RC Circuit - Charging
18. Relative Velocity: Boat Crossing a River
19. Static friction on a ramp
20. Ballistic Pendulum Author:Dave Nero
21. Elastic & Inelastic Collisions
22. Pendulum Energy
23. Stellar Parallax Author:Malin Christersson

You can use iframe to get around javascript restrictions in LMSes and other restricted websites such as Google Sites, etc.
I showed some examples above, and here is more specific information about how it works; let's take that Growth Mindset Cats Canvas widget for example.
The text snippet that you can paste into any Canvas page looks like this:

As you can see, it's an iframe, and the webpage that the frame holds is a webpage