FracFu

Above is a demo of FracFu! With this art tool you can create crazy fractals easily from any input picture.

Below is a pay what you can full version. It is much better. Extra features include Fullscreen, background change, download image, making fractals out of fractals, a help button, moveable UI, Hue as well as color change, and speed updates. Here is a look at the full version UI. Much more area to draw with.

And here is an example of a fractal made from a fractal:

This software was used to create some tshirts! Check them out here