Public repository for the 2023 edition of HPPS

a lightweight, robust, scheme-like lisp implementation

A CHIP-8 emulator in AWK programming language

A lightweight web browser based on Dillo but with many improvements, such as: support for http, https, gemini, gopher, epub, reader mode and more...

A tool for manipulating X windows

Tofu window manager for X11.

best possible use of sed

Free/libre software for Kobo ebook readers

A textbook on informal homotopy type theory

Lisp interpreter inspired by John Shutt's Kernel.

Driving Compilers

Seekable compressed tar

a prototype dependent type functional language, implemented by a simple interpreter in scheme.

A scheme port of the Haskell code from "A Tutorial Implementation of a Dependently Typed Lambda Calculus"

🧮 Programming with pure lambda calculus

Minimal X11 onscreen keyboard

a BQN implementation in C

Scheme In One Defun

A simple implementation of the SECD abstract machine (https://en.wikipedia.org/wiki/SECD_machine)

FUNCTIONAL PROGRAMMING: Application and Implementation, Peter Henderson, ISBN 0-13-331579-7

MIT CADR original verilog and simulator

picolibc - a C library designed for embedded 32- and 64- bit systems.

An Awk-inspired programming language for writing simple GUIs

Compact and straightforward file manager for Unix X11/Motif.

The clipboard manager is responsible for saving data when clients want to

A mini Lisp in 1k lines of C with garbage collector, explained. Includes over 40 built-in Lisp primitives, floating point, strings, closures with lexical scope, macros, proper tail recursion, excep…

Primitive paint application for X

a really bad wm made by someone not qualified to make a wm