These are programs that don't fit in any other category. Usually math/physics-related.
* This is a simple spiral-generating program. You can create some very interesting images with a bit of experimentation (my favorites feature a Resolution less than 5 with a Pi Factor of about 99.)
* One of my favorite programs, it is a screensaver-like adaptation of the N-bodies problem (a number of objects floating in space, all interacting with each other via gravitic attraction.) Modify the included *.ini file for different program behavior.