1. Geogebra, Physics interactive simulations
    2. 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