The LaTeX2e kernel
The expl3 (LaTeX3) Development Repository
Formatting library as an alternative to C stdio and C++ iostreams
Generates utilities to aid in serializing to/from JSON.
The static code analysis tool you need for your HTML
A static analyzer for Java, C, C++, and Objective-C
A tool that automatically formats Python code to conform to the PEP 8
From community websites to web applications, this CSS framework
JSON that's part of C++
WebDriver for Firefox
A static analysis tool for shell scripts
The fastest JSON schema Validator
HTML, CSS and JS framework for developing responsive websites and apps
arXiv LaTeX Cleaner: Easily clean the LaTeX code of your paper
the MiKTeX source code
webrpc is a schema-driven approach to writing backend services
A language for writing HTML user interfaces in Go
Skin changer for League of Legends (LOL)
Documentation tool for ObjectPascal (Free Pascal, Lazarus, Delphi)
Extensions for Moshi including IR plugins, moshi-sealed, and more
Simple, useful and opinionated config loader
Web Framework built on top of Qt, using the approach of Catalyst
A small library for converting tokenized PHP source code into XML
Static site generator. Simple, customisable, fast, maths with KaTeX
Tom Preston-Werner's obvious, minimal language