Simulum deals with different simulations of star movements and their visualizations. At first it looks at the projection and accumulation of star brightness. In actually doing this it distributes stars among a three dimensional figure. To get a nice effect it combines the photographic image production with a moving view point. So the outcome is the visual impression of flying through a star field. Secondly it studies different algorithms of particle movements and clustering. The primary approach uses a combination of Newton's gravitational law, energy, and impulse conservation. At all these stages an highly dynamic view of the processes is able to be produced.
DeskToy is a 3D screensaver for OS X. A complex set of linked pendulums is displayed in perpetual motion. The behavior of the view and the behavior of the model is highly configurable using the screensaver property sheet. The screen saver is shipped in Universal Binary format for OS X 10.4+.