Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.

very interesting ... giving it a try.

Help with C++ class

this site apparently show the popularity of various programming languages based on their popularity among various online searches. neat.

basically a bunch of hacking challenges.

A perspective on how to balance testing.

Simple standard for testing and reporting results.