The story goes much the same way as the others I suspect, only this one could draw high res images very fast. I learned the maths behind a dozen or so fractal types and various colouring strategies, made some very pretty pictures.

Unfortunately as it was on client time and equipment I couldn't take it with me and it lives on only as a piece of sample code attached to the client's distributed processing framework!

But damn - drawing 38400 x 21600 resolution sets in record time was fun :)