This is one of the best all around sites that I have found. It is titled “The MacTutor History of Mathematics Archive.”
This is an award-winning site that links to all sorts of mathematics information.
Topology was presented for the first time by Jules-Henri Poincare:
The first serious study of topology was conducted by L.E.J. Brouwer:
The set theory of Cantor provided a basis for topology:
Felix Hausdorf was also important in the development of topology:
Fractal geometry was first presented by Benoit Mandelbrot: