AlgLab contains laboratories for conducting experiments on algorithms. It includes resources and tools to learn about a problem and its algorithm, run programs to measure performance, and modify programs and run experiments. AlgLab also provides links to algorithm resources.
CALGO contains software associated with papers published in the ACM Transactions on Mathematical Software 
and other ACM journals. The software is refereed for originality, accuracy, robustness, completeness, portability, and lasting value.
Based on his book The Algorithm Design Manual, Steven S. Skiena has mounted this site containing a collection of algorithm implementations for over seventy of the most fundamental problems in combinatorial algorithms.
