GPT in 60 Lines of NumPy, good overview.
A Dynamic Forth Compiler for WebAssembly (2018), by Remko Tronçon.
blkhash, a block based hash optimized for disk images. Supports sparse files and QCOW file format with compression.
Lisa Source Code: Understanding Clascal, an early OO Pascal dialect used at Apple. More.
Estimating Square Roots in Your Head, using Heron’s method.
Vintage Pachinko: Going Back and Forth Across the Pacific, by Nicole Branagan.
FlappyBirdle, oh no!