myphysicslab is a project site from Erik Neumann, full of physics experiments you can try directly online or (better, faster) offline, simply downloading all the things in a single zip file. Forces, vectors, springs, object collisions, and much more! you can easily control parameters and graph things, change colors, number of objects, gravity and so. Here ..
Algodoo is a unique 2D-simulation software from Algoryx Simulation AB. It mix a easy to use interface with a complex system of available simulations «objects» (or scenes, or tools) you can use for educational or testing purposes. Formerly born as Phun, and free for many platforms, was turned to a pay version called “Algodoo” for a ..
The Powder Toy is a free physics sandbox game which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances! The game provides you with various building materials, liquids, gases and electronic components which can be used to construct complex machines, guns, bombs, realistic terrains and almost anything else. ..