Gravitator is a gravity simulation program.You can create up to 65 objects to float around and interact with each otherall at once. Gravitator also let s you view and edit the position, velocity,mass, radius and density of all your floaters. To make interaction for youeasier, everything is done with a simple point and click of the mouse. Youwill even be able to edit during animation.Don t worry if your animation floats away because your screen acts like amoveable camera that will allow you to follow the animation.But the best feature of all is, it s free!