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 ..
Heron Animation is a free stop motion animation program that lets you take pictures from a webcam and assembles them into an animation. Is simple to use and has a clean and user-friendly interface, which make it perfect for beginners and more experienced animators alike. It features: Instant playback, Onion Skinning, compatibility with a wide range of webcams, ..