Here are some of the open-source projects I’ve built from scratch:

ElasticSearch with React: An example project showing how to combine an Elasticsearch back-end with a React-powered front-end

Party Party Party: Turn a source image into an animated party emoji

A/B See: WordPress A/B testing in two shortcodes

Learn Python, Break Python: A free introductory textbook for beginner programmers

rl.js: JavaScript library to build canvas roguelikes

Buster: Back-end Reddit API polling, front-end Twitter recommendations

Arcadia: An open web-based game engine

No Thank You, Website!: An open-source Chrome productivity extension

Twelve Sands: Browser-based role-playing for four wonderful years and thousands of players