The Stony Brook Algorithm Repository - intended to serve as a comprehensive collection of algorithm implementations for over seventy of the most fundamental problems in combinatorial algorithms. http://www.cs.sunysb.edu/~algorith/
Waterloo Fractal Compression Project - part of a general research programme dedicated to the study of fractal analysis and Iterated Function Systems/Fractal Transforms from both theoretical as well as practical perspectives. http://links.uwaterloo.ca/