Physics and Motion
Pendulums, dynamic circular movement, vectors, forces, etc...

Random Connected Motion
I suppose this is more of the motion side of this category - random movement with lines drawn to the mouse :) Edit: Pretty s ...
Line Repelling
Hmm, not sure what this is. A grid of points which are repelled by the mouse and attracted by their starting positions. Not t ...
Terrain Collisions
The code is really really condensed, and if you wish to have it be a bit more understandable, see this thread: www.kirupa ...