Truly amazing! – Acrobots Review

Very entertaining for such a simple premise: watch things bounce around. The "replay" value is apparent when you see how drastic the acrobots' behavior changes when you change a few rules (gravity, balance, stickiness, etc). This is an incredible piece of software. Any math/physics/computer science geek will appreciate what's going on behind the scenes, and anyone can enjoy just playing with it.
Review by Ypdpydy on Acrobots.