Some things I have made or helped make:
Von Thünen's Model Agricultural Map: An interactive Geography exercise demonstrating Von Thünen's Model using agricultural production on a map of the United States
Custom BBCode: A modification for FluxBB that allows administrators to add new BBCode tags.
PyBot: A simple IRC Bot written in Python.
SuperInteractiveText 3000: Some sort of lame text adventure thing.
Vortex Wars Dice Simulator: A simple script that simulates thousands of Vortex Wars battles to approximate probabilities.
Risk Roller: A simple script that simulates Risk battles with large amounts of dice and tells the outcome.