It's a cool web-browser collection of free 3D games ( some 3D ) and few are really good.
For example, ThinkTanks! Cartoonish yet... unique fighting/shooting.
Fallen Legions. Must be the best game they made for InstantAction. It's a free-to-move shooter that lets you fly, move VERY fast, and hear people complain when they explode with a grenade launcher. ( graphics on highest detail are good too )