An HTML/CSS Schema for TeX Primitives – Generating High-Quality Responsive HTML from generic TeX, by Dennis Müller. Introducing RusTeX which has very promising results.
Linear-time parser combinators in OCaml, by Neel Krishnaswami.
Livegrep is a tool, partially inspired by Google Code Search, for interactive regex search of gigabyte-scale source repositories.
“Back in my day …”, Paul Battley reviews 20 years of Ruby in 5 minutes.
tldraw, “a very good whiteboard”.
Paul Falstad’s Circuit Simulator, now written in JavaScript. Really educational!
A tutorial quantum interpreter in 150 lines of Lisp, by Robert Smith.
Illuminant, an ActivityPub server with an NNTP interface.
c72, a port of the earliest C compiler to x86.