You have seen now some examples of fractal-pictures.
All were done with the freeware - program called
Fractint for DOS or Winfract.
Perhaps You got the wish to generate such images
by Your own.It is very easy!
Here You find some links where You are able to
download the two programs and some other sample
pictures.
1.)The WWW-Fractint Site:
2.)Some other sample pictures: