Mandelbrot and Julia Sets, and Targa Files
This is your basic Mandelbrot set. My program has the ability to calculate "divergence" based on either a square or a circular area, and when the square area is used, the edges become scalloped, as shown here.
This is a common Julia set. All of these files were originally written as targa files, and then converted into gif files using a utility.
Source Code
William Luebke, 1998