Code to read Assembly Richard WM Jones's Forth - Richard WM Jones's literate x86 assembly implementation of Forth C Nethack - Single player dungeon exploration game PostgreSQL - Object-relational database management system C++ Stockfish - Chess engine Common Lisp cl-ppcre - Common Lisp regular expression library Haskell Scroll - Roguelike game developed during the 2015 7drl challenge. Joey Hess wrote a series of blog posts describing the development of the game.