Frédéric van der Essen

nano. One file. Under 200 lines. Zero dependencies. It's a coding agent.

superpowers. An agentic skills framework & software development methodology that works.

pi-mcp-adapter. Token-efficient MCP adapter for Pi coding agent

agent-stuff. These are commands I use with agents, mostly Claude

pi. AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

hopl. Human Only Public License

hono-react-ssr-shadcn-ui. Template code for Honojs with React 19 with SSR, Tailwindcss 4.1, Vite 8, Shadcn-UI, i18n and a simple blog which running on Cloudflare Pages.

typst. A markup-based typesetting system that is powerful and easy to learn.

zed. Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

ts-pattern. 🎨 The exhaustive Pattern Matching library for TypeScript, with smart type inference.

airo. Deploy your projects from local to your production VPS.

mock-knex. A mock knex adapter for simulating a database during testing

testcontainers-node. Testcontainers is a NodeJS library that supports tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

parse5. HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.

fast-xml-parser. Validate XML, Parse XML and Build XML rapidly without C/C++ based libraries and no callback.

marked. A markdown parser and compiler. Built for speed.

baum. Baum is an implementation of the Nested Set pattern for Laravel's Eloquent ORM.

efficient-language-detector-js. Fast and accurate natural language detection. Detector written in Javascript. Nito-ELD, ELD.

ink. 🌈 React for interactive command-line apps

instant. Instant is the best backend for AI-coded apps. You get auth, permissions, storage, presence, and streams — everything you need to ship apps your users will love.

gitopper. Gitops for non-Kubernetes folks

pixels. A tiny hardware-accelerated pixel frame buffer. 🦀

softbuffer. Easily write an image to a window

rust_minifb. Cross platfrom window and framebuffer crate for Rust

geckos.io. 🦎 Real-time client/server communication over UDP using WebRTC and Node.js http://geckos.io

GildedRose-Refactoring-Kata. Starting code for the GildedRose Refactoring Kata in many programming languages.

borgo. Borgo is a statically typed language that compiles to Go.

nope. Please do not program in the NOPE programming language

rust-shlex. Split a string into shell words, like Python's shlex.

imgcatr. cat for images, by RUST 🦀️

plandex. Open source AI coding agent. Designed for large projects and real world tasks.

aider. aider is AI pair programming in your terminal

pytest-fail-slow. Fail tests that take too long to run

gpwg. A good password generator

ratatui. A Rust crate for cooking up terminal user interfaces (TUIs) 👨‍🍳🐀 https://ratatui.rs

gen.nvim. Neovim plugin to generate text using LLMs with customizable prompts

Gooey. Turn (almost) any Python command line program into a full GUI application with one line

Startup-CTO-Handbook. The Startup CTO's Handbook, a book covering leadership, management and technical topics for leaders of software engineering teams

perspective. A data visualization and analytics component, especially well-suited for large and/or streaming datasets.

coz. Coz: Causal Profiling

loxido. Rust implementation of the Lox programming language

lunapark. 🎡 The most advanced visual scripting editor for the web.

minimal. A Theme for GitHub Pages

vim-ai. AI-powered code assistant for Vim. OpenAI and ChatGPT plugin for Vim and Neovim.

ai.vim. Generate and edit text in Neovim using OpenAI and GPT.

ml-ane-transformers. Reference implementation of the Transformer architecture optimized for Apple Neural Engine (ANE)

alpaca.cpp. Locally run an Instruction-Tuned Chat-Style LLM

llama.cpp. LLM inference in C/C++

llama-cpu. Fork of Facebooks LLaMa model to run on CPU

textgen. Open-source desktop app for local LLMs. Text, vision, tool-calling, OpenAI/Anthropic-compatible API. 100% private.

ChatGPT. Reverse engineered ChatGPT API

prompts.chat. f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.

cli-clipboard. System Clipboard interfacing library in Rust

GPTReview. Get OpenAI GPT models to review your PR's

chatGPT-python-elm. A repository fully generated by ChatGPT making it believed it checked out a this repository which I described like the first line of the README.

cargo. 📦 GitHub Action for Rust `cargo` command

cryptopals-python3. Solutions to Matasano crypto challenges in Python 3.

Glitter. Dead Simple OpenGL

tufte-css. Style your webpage like Edward Tufte’s handouts.

serve2d. Protocol detecting server

IncCth. An incremental web game about the Cthulhu universe

waypoint. Teleport around your shell.

divsugar. A CSS-based 3D graphics library

uBlock. uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox, and Safari.

RCSS. Turn your JavaScript objects into CSS classes.

AdNauseamV1. *** This is not the current AdNauseam repository: please find the current repo here:

slap. Sublime-like terminal-based text editor

lowdb. Simple and fast JSON database

odoo. Odoo. Open Source Apps To Grow Your Business.

autoprefixer. Parse CSS and add vendor prefixes to rules by Can I Use

grunt-nodestatic. Start a node-static web server (perfect as a development server combined with watch or regarde).

jcconv. jcconv "JapaneseCharacterCONVerter", interconvert hiragana, katakana, halfwidth kana'

canvas-puyo. A 2D puyopuyo in HTML5 canvas

db.js. db.js is a wrapper for IndexedDB to make it easier to work against

Ghost. Independent technology for modern publishing, memberships, subscriptions and newsletters.

bluebird. :bird: :zap: Bluebird is a full featured promise library with unmatched performance.

Tny. A simple data serializer in C

javascript-jpeg-encoder. A JPEG encoder for Javascript

zeroclipboard. The ZeroClipboard library provides an easy way to copy text to the clipboard using an invisible Adobe Flash movie and a JavaScript interface.

clippy. Clippy is a very simple Flash widget that makes it possible to place arbitrary text onto the client's clipboard.

coinwidget.com. The Bitcoin and Litecoin Donation Button

jquery-qrcode. jQuery plugin to dynamically generate QR codes.

lz-string. LZ-based compression algorithm for JavaScript

ring.js. Ring.js - JavaScript Class System with Multiple Inheritance

gridless-boilerplate. Gridless is an awesome HTML5 and CSS3 boilerplate for making responsive, cross-browser websites with beautiful typography

augment. The world's smallest and fastest classical JavaScript inheritance pattern.

jquery-pjax. pushState + ajax = pjax

jsandbox. A JavaScript sandboxing library that uses web worker threads

pygreen. A micro web framework/static web site generator.

markdownviewer. A very simple markdown viewer using socket.io

loadingquest. Loading Quest

Shiverz. A collection of JavaScript modules for vector, matrix, geometry, scene graph and other interactive and game design related projects

mumbl. A JavaScript library that abstracts audio-playing functionality of HTML5, Songbird, and SoundManager 2 for use in music playlists

j2d. An improved version of bastos85, remade in Java using lwjgl

Thesis. My master thesis

Naphta. a 3d engine.

Seminar. Code for the AI seminar

NLP. Projets pour Natural Language Processing

bgdetect. Detects the background pixels in a video

mumbl. A JavaScript library that abstracts audio-playing functionality of HTML5, Songbird, and SoundManager 2 for use in music playlists

lang. Projet langage et traducteur.

gally. A raytracer / rasterizer for the Graphics course @ UCL

langettrad. Projet du cours langage et traducteur

fvdsn.github.com. Fvdsn's github homepage.

bastos85. A little opengl game & physics engine.

distributedwikipedia.

ingi2141. A java implementation of the NetBLT Protocol. Assignment for Ingi2141 Course.

tuned. A small music making program

himalaya. A 2D graphics library