Gargi's delightful RustConf talk explains syscalls and how to write a system call tracer (like strace) using Rust.
A Racket to x86 compiler written in Racket.
A browser-based implementation of the game Plinko. You can see the source code here: https://github.com/alejvillanueva/ComputerPlinko
A tool for teaching web programming that interactively visualizes how the DOM and CSS selectors work. You can see the code here: https://github.com/wylieconlon/dom-simulator
Pretty Mes is a Flask app that parses current news headlines to generate "mesostics" (a type of procedural poem) and generative typographies from current news headlines in the style of American experimental artist John Cage.
Sher Minn built an interpreter for the long-defuct "ART 1" programming language from the 1960s, and used it to recreate some of the earliest pieces of computer art. You can see the code here: https://github.com/piratefsh/art1.js
This is a program written in Python to generate and edit mosaic knitting patterns, with built-in validation based on whether the pattern is possible to physically knit! It's currently designed to build an 8 stitch by 8(16) row block, displayed as a tesselation in real time.
A brief history of the uses of popcount (aka 'the NSA instruction'), delivered at !!Con 2019.
A reimplementation of the SQLite database, written once in C, and again in Python.
A program for the HP7440A pen plotter which draws midi notes real-time as they are received ^^