In the course of my work, I have contributed to many open source projects, and I am solely or largely responsible for the following pieces of software:

• MockR - easy Mock Objects for Ruby
• DotR - Ruby wrapper for the ‘dot’ graphing utility
• PyUnit - the standard unit-testing library for Python
• Airspeed - Velocity-compatible templating for Python

These days I keep my code in git: you can browse it using gitweb here.