This page is mostly about programming languages. I used many over the years, and even learned how to make my own, but one in particular remains my all-time favorite:
It all started with a tutorial I wrote in 2009 to make some things more clear to myself, and culminated in 2016 with my interpreter construction book. Since then I wrote more about it, but newer experiments didn't pan out.
Awesome compilers (Compilers, Interpreters, Runtimes and VMs) A curated list of awesome resources, learning materials, tools, frameworks, platforms, technologies and source code projects in the field of Compilers, Interpreters and Runtimes. This list has a bias towards education.
Just write the #!%/* parser: Writing parsers from scratch. Why simpler is better and why you don't need a parser generator.