The thing I’m best known for is my work writing PsychoPy, the free easy software for psychology experiments.

PsychoPy offers a unique combination of interfaces, allowing you to create code in a really simple visual interface, with a flow diagram and dialog boxes to control stimuli, and a Python library for those that want to hand-code scripts in the powerful Python programming language.

All of this (many years of work and hundreds and thousands of lines of code) is open source and free1 for everyone.

PsychoPy has become the software package of choice in labs and undergraduate classrooms all over the World, with over 20,000 monthly users.

For (independent) metadata about the project see

  1. Free as in beer and free as in speech (no charge and do what you like)