SuperFractalThing is a freeware application that uses perturbation
theory to render arbitrary
precision Mandelbrot set images in seconds. SuperFractalThing can also
be used to create Mandelbrot set movies, and poster size images.
To zoom in, either double click, or drag out a box and click inside the
box. The number of iterations is automatically adjusted, but you may
need to change it manually in the preferences window.
Note that the image rendered in the window is limited to 4096x4096
pixels. Higher resolution images will look blurry, and you will have to
export as a png to see the full resolution. The max resolution allowed
is 12000x10000
SuperFractalThing uses approximations to render its images. In extreme
images,
these approximations can occasionally go wrong. Watch out for areas
that are
inconsistent when zooming or translating.