Alexandre Stefanov long maintained a list of online math texts and other materials at Geocities, but it appears that his original web site is no longer available. Because these resources may be of interest to our readers, we present here a modified version of Stefanov's list as of November 18, 2009. We welcome corrections or suggested additions to this list.

See also Math on the Web, compiled by the American Mathematical Society, for more online math resources.

Fractals

• Fractals in the Plane - the Ergodic Theory Methods, by F. Przytycki and M. Urbanski
• Lecture notes in Conformal Dynamics, taught by Curt McMullen.
• Fractals, by Dr. P. G. Dixon

Graph Theory

• Graph Theory, by Reinhard Diestel (printing disabled)
• Interactive Graph theory tutorials, by Chris K. Caldwell (must register to use)

Coxeter groups

• Miscellaneous facts about Coxeter groups, by Robert B. Howlett
• Buildings, BN-pairs, Hecke algebras, classical groups, by Paul Garrett

Nielsen Fixed Point Theory

• Ross Geoghegan's Home Page, has a set of papers

Permutation Puzzles

• Mathematics of Rubik's cube, by David Joyner is a good source for discrete group theory with applications to permutation puzzles.