AutoBG

AutoBG is a program for Windows 7 which dynamically generates images to be used in a desktop background slideshow. When Windows (or the user) goes to the next background slide, the program will create a new image to be used next. When you want more than static content for you desktop background, AutoBG has you covered.

AutoBG comes with a few sample generating programs, including a random image from the Mandelbrot set or a random xkcd comic, but it is designed to allow other programs to be easily designed and added. See the source for more.