Simulator of iceberg buoyancy based on drawing a free-form shape.

This interesting correction to a back-of-the-envelope calculation of the legendary Richard Feynman relating to the relativistic time differential between the surface and the core of the Earth.

This nice explanation of the maths and Newtonian mechanics involved in getting rockets into orbit and manoeuvering them through space, explained very clearly and in detail.

An extremely well-made explanation of how internal combustion engines work.

A very nice explanation of the Maxwell equations, including many diagrams and equations.

An online textbook called “Structure and Interpretation of Classical Mechanics” which uses Scheme, a lisp to do computer simulations of classical mechanics.