Ok, I don't really deserve any credit for this one. This was rendered awhile back in XaoS 3.0, so most of the credit goes to its authors.
It's just a section of the classic Mandelbrot fractal. More specifically, a section from the mu plane at (-0.213973155, -0.65629317) zoomed to 2739.41X, so radius is about 0.000912605150.
I love the Mandelbrot, but I always have way too much fun with programs like XaoS, zooming around and palette-shifting and finding cool areas of the fractal that never end.