Welcome to the nanoworld of the Pixel Paradox universe of 2099 AD. Geo Gizmo is a pollution-free nanodevice that acts as a perpetual-motion machine to generate electricity from artificial gravitons in motion above a quantum energy plate, without any loss of kinetic energy. However, not only is it functional, it's also a marvelous work of art. Gee whiz, it's a Geo Gizmo! Disclaimer: This screensaver, Geo Gizmo 3D, does not generate electricity.
Gravit is a gravity simulator which runs under Linux, Windows and Mac OS X. It's released under the GNU General Public License which makes it free. It uses Newtonian physics using the Barnes-Hut N-body algorithm. Although the main goal of Gravit is to be as accurate as possible, it also creates beautiful looking gravity patterns.
