meqon is a real time pysics simulator. It seams acurate and simulates objects on the computer as if they are real. http://meqon.com/downloadarea/meqon-demos-1.4.zip It is much like a first person game only there is no goal its just clever and interactive. Here are some screenshots http://img228.exs.cx/img228/6864/meqon2jw.jpg and read about it here: www.meqon.com dosent need installing (I hate apps you have to install) Does primarily "rigid body" pysics and a liquid and cloth simulation. Havock is the other company compeeting in this field but to show them you will need a game called "half life 2" These two combines kick started objects being introduced into games that have this level of physics based user interaction.