Vinzenz 'evilissimo' Feenstra

tau. a minimalist agent that teaches you to create coding agents

absurd. An experiment in durability

firecrawl. The API to search, scrape, and interact with the web at scale. 🔥

openpencil. The world's first open-source AI-native vector design tool and the first to feature concurrent Agent Teams. Design-as-Code. Turn prompts into UI directly on the live canvas. A modern alternative to Pencil.

noslop. Enforcement-first quality gate installer for 19 languages: TypeScript, Rust, C#, Go, Python, Java, PHP, Ruby, Swift, Kotlin, C++, Scala, Elixir, Dart, Zig, Haskell, Lua, OCaml & more

preflight. A simple, structured "Project OS" that helps you turn your rough idea into a solid plan that AI can actually follow.

Agent-Skills-for-Context-Engineering. A comprehensive collection of Agent Skills for context engineering, multi-agent architectures, and production agent systems. Use when building, optimizing, or debugging agent systems that require effective context management.

interface-design. Design engineering for Claude Code. Craft, memory, and enforcement for consistent UI.

claude-config. My claude code customizations / config.

taches-cc-resources. A collection of my favorite custom Claude Code resources to make life easier.

spdlog. Fast C++ logging library.

tinycoro. TINYCORO — Modern C++20 Coroutine Library For Asynchronous Programming

postgres-protobuf. Protocol Buffer extension for PostgreSQL

reflect. C++20 Static Reflection library

niimprint-web. A simple Niimbot D11/D110 web tester

whisper.cpp. Port of OpenAI's Whisper model in C/C++

leapp-repository. Leapp repositories containing actors for the Leapp framework (https://github.com/oamg/leapp). Currently provides leapp repositories for in-place upgrades of RHEL systems.

leapp-supplements. Supplementary actors for the Leapp project (https://github.com/oamg/leapp). It aims to handle common 3rd party use cases during the upgrade process.

noTunes. A simple macOS application that will prevent iTunes or Apple Music from launching.

liblzma. Getting static liblzma libraries for Windows for VC++ and MinGW

regex_turing_machine. The find/replace box in Notepad++ is Turing Complete

briefcase. Tools to support converting a Python project into a standalone native application.

toga. A Python native, OS native GUI toolkit.

minivm. A VM That is Dynamic and Fast

useful-sed. Useful sed scripts & patterns.

torpy. Pure python Tor client implementation

nvui. A modern frontend for Neovim.

craftinginterpreters. Repository for the book "Crafting Interpreters"

FTXUI. :computer: C++ Functional Terminal User Interface. :heart:

avrIO. C++11/17/20 library for manipulating I/O port pins and I/O registers of AVR8

leapp-dashboard-source. Source code of the leapp dashboard repository

EleLab_v2. Cheap DIY lab system for hobbyists and the tinkering folk

pydis. A redis clone in Python 3 to disprove some falsehoods about performance.

ruia. Async Python 3.6+ web scraping micro-framework based on asyncio

lazygit. simple terminal UI for git commands

gocui. Minimalist Go package aimed at creating Console User Interfaces.

owl. A parser generator for visibly pushdown languages.

kcli. Management tool for virtualization and kubernetes platforms

t2b. A wicked-powerful text macro language for building binary files.

lxc-desktop. Multiple desktop environments on a single machine with Linux containers

go-internals. A book about the internals of the Go programming language.

dragonffi. C Foreign Function Interface and JIT using Clang/LLVM

dxvk. Vulkan-based implementation of D3D8, 9, 10 and 11 for Linux / Wine

selinon. An advanced distributed task flow management on top of Celery

promptui. Interactive prompt for command-line applications

rclone. "rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files

json-to-go. Translates JSON into a Go type in your browser instantly (original)

img4lib. image4 vfs

open-source-flash. Petition to open source Flash and Shockwave spec

gopher-os. A proof of concept OS kernel written in Go

snaptile. Versatile window tiling for X11 with powerful keyboard controls

lexmachine. Lex machinary for go.

leapp. Leapp - Application & OS Modernization Framework (For in-place upgrades, follow leapp-repository)

node-packer. Packing your Node.js application into a single executable.

x64asm. x86-64 assembler library

CoreFreq. CoreFreq : CPU monitoring and tuning software designed for the 64-bit processors.

helio-sequencer. Libre music sequencer for desktop and mobile platforms

py-backwards. Python to python compiler that allows you to use Python 3.6 features in older versions.

closure-compiler-angular-bundling-old. demo app for https://github.com/angular/angular/issues/8550

pics. File formats dissections and more...

atomic-system-containers. Collection of system containers images

security-101-for-saas-startups. security tips for startups

usql. Universal command-line interface for SQL databases

kubevirt. Kubernetes Virtualization API and runtime in order to define and manage virtual machines.

single_file_libs. List of single-file C/C++ libraries, with emphasis on clause-less licenses.

concurrentqueue. A fast multi-producer, multi-consumer lock-free concurrent queue for C++11

go-peerflix. Go Peerflix

torrent. Full-featured BitTorrent client package and utilities

modern-cpp-features. A cheatsheet of modern C++ language and library features.

go-libvirt. Package libvirt provides a pure Go interface for interacting with Libvirt. Apache 2.0 Licensed.

blueprint. A React-based UI toolkit for the web

qt. Qt binding for Go (Golang) with support for Windows / macOS / Linux / FreeBSD / Android / iOS / Sailfish OS / Raspberry Pi / AsteroidOS / Ubuntu Touch / JavaScript / WebAssembly

goja. ECMAScript/JavaScript engine in pure Go

sqlx. general purpose extensions to golang's database/sql

str. Package str is a string library to build more Go awesomeness

script.kodi.hue.ambilight. Kodi add-on for Philips Hue lights with ambilight support. Based on @cees-elzinga 's original work.

libui. Simple and portable (but not inflexible) GUI library in C that uses the native GUI technologies of each platform it supports.

mgmt. Next generation distributed, event-driven, parallel config management!

nativefiledialog. A tiny, neat C library that portably invokes native file open and save dialogs.

OSX-KVM. Run macOS on QEMU/KVM. With OpenCore + Monterey + Ventura + Sonoma support now! Only commercial (paid) support is available now to avoid spammy issues. No Mac system is required.

gallium. Build desktop applications in Go and HTML.

LaZagne. Credentials recovery project

WMI. C++ WMI class library

sol2. Sol3 (sol2 v3.0) - a C++ <-> Lua API wrapper with advanced features and top notch performance - is here, and it's great! Documentation:

cpuid.py. Pure Python interface to the CPUID instruction

blur-admin. AngularJS Bootstrap Admin Panel Framework

thebookofshaders. Step-by-step guide through the abstract and complex universe of Fragment Shaders.

rkt-rpm. Mirror for Fedora's rkt dist-git

bootstrap-multimodal. A Bootstrap plugin that adds support for multiple open modals.

vis. A vi-like editor based on Plan 9's structural regular expressions

the-super-tiny-compiler. :snowman: Possibly the smallest compiler ever

dbtpl. Command line tool to generate idiomatic Go code for SQL databases supporting PostgreSQL, MySQL, SQLite, Oracle, and Microsoft SQL Server

react-patternfly. A set of common React components to use with the PatternFly

litehtml. Fast and lightweight HTML/CSS rendering engine

CppCoreGuidelines. The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++

cpr. C++ Requests: Curl for People, a spiritual port of Python Requests.

svgo. Go Language Library for SVG generation

bareos. Bareos is a cross-network Open Source backup solution (licensed under AGPLv3) which preserves, archives, and recovers data from all major operating systems.

rust-doom. A Doom Renderer written in Rust.

adobe_source_libraries. Adobe Source Libraries

adobe_platform_libraries. Adobe Platform Libraries

qo. Another build system for C/C++, I guess? Inspired by 'go build'

asmjit. Low-latency machine code generation

osquery. SQL powered operating system instrumentation, monitoring, and analytics.

clumsy. clumsy makes your network condition on Windows significantly worse, but in a controlled and interactive manner.

WinDivert. WinDivert: Windows Packet Divert

pyston_v1. The previous version of Pyston, a faster implementation of the Python programming language. Please use this link for the new repository:

libsixel. A SIXEL encoder/decoder implementation derived from kmiya's sixel (https://github.com/saitoha/sixel).

libtins. High-level, multiplatform C++ network packet sniffing and crafting library.

vivom. dead simple, tiny but powerful Go ORM

xmlrpc. Implementation of XMLRPC protocol in Go language.

vimbed. A plugin for embedding vim

chalcogen. Embed vim in atom.

compilers-webpage. Webpage source for compilers-webpage

minibsdiff. A miniature, portable version of bsdiff.

libpypa. libpypa is a Python parser implemented in pure C++

cppnow_presentations_2014. Presentation materials presented at C++Now 2014

ovirt-guest-agent-packaging. Packaging repository for the ovirt-guest-agent

gitignore. A collection of useful .gitignore templates

invoiceninja. A source-available invoice, quote, project and time-tracking app built with Laravel

bgfx. Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

godot. Godot Engine – Multi-platform 2D and 3D game engine

win. A Windows API wrapper package for the Go Programming Language

walk. A Windows GUI toolkit for the Go Programming Language

vim-fugitive. fugitive.vim: A Git wrapper so awesome, it should be illegal

goquery. A little like that j-thing, only in Go.

libarchive. Multi-format archive and compression library

youtube-dl. Command-line program to download videos from YouTube.com and other video sites

websocketpp. C++ websocket client/server library

epaxos. Go

free-programming-books. :books: Freely available programming books

ovirt-engine. The oVirt Engine virtualization manager

prana. Prana is a library providing a generic AST data structure called utree

favicon-cheat-sheet. Obsessive cheat sheet to favicon sizes/types.

shipbuilder. The Open-source self-hosted Platform-as-a-Service written in Go

Shortfin. Shortfin is a very fast and lightweight open-source web server that serves static content only.

oauth-js. OAuth that just works ! This is the JavaScript SDK for OAuth.io

vim-template. Simple templates plugin for Vim

Probabilistic-Programming-and-Bayesian-Methods-for-Hackers. aka "Bayesian Methods for Hackers": An introduction to Bayesian methods + probabilistic programming with a computation/understanding-first, mathematics-second point of view. All in pure Python ;)

storm. Manage your SSH like a boss.

rustboot. A tiny 32 bit kernel written in Rust

macropy. Macros in Python: quasiquotes, case classes, LINQ and more!

pyroute2. Python Netlink and PF_ROUTE library — network configuration and monitoring

webcam-pulse-detector. A python application that detects and highlights the heart-rate of an individual (using only their own webcam) in real-time.

moby. The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems

auto-boilerplate. Minimalistic autotools project boiler plate for C++ applications/libraries

animate.less. A tiny CSS3 animation library with plug & play options.

ChromeSkel_a. A bootstrapped Chrome Extension

VMInjector. DLL Injection tool to unlock guest VMs

vdsm. The Virtual Desktop Server Manager

ovirt-guest-agent. This is a mirror for http://gerrit.ovirt.org, for issues use http://bugzilla.redhat.com

dwm.vim. Tiled Window Management for Vim

vsqlite--. VSQLite++ Library - BSD-3 Licensed

ircpp. C++ IRC client library

roguelike. C++

blastbeat. The BlastBeat server

roguelike. C++

webkitmm. webkitmm - WebKit for gtkmm

fr_public. Farbrausch demo tools 2001-2011

html5. HTML5 Desktop investigation

maximal. Maximal Music website

website. Public website

fcppt. Freundlich's C++ toolkit

evipp. evilissimo's C++ utilities library

Dark-MIR. Clone of the SVN repository of Dark MIR

detect. Proposed Boost.Detect library

website. Public website

wiselib. A generic algorithms library for heterogeneous, distributed, embedded systems.

WebIntents. A client side service discovery and execution model.

boost.atomic. Hartmut Kaiser and Bryce Lelbach's version of Boost.Atomic

detect. Proposed Boost.Detect library

phoenixfs. 🔥 a versioning filesystem inspired by git

requests. A simple, yet elegant, HTTP library.

decompile-dump. Partial stuxnet source decompiled with hexrays, if anyone has better decompile tools feel free to contribute better versions.

ninja. a small build system with a focus on speed

imagefactory. imagefactory builds images for a variety of operating system/cloud combinations.

mosh. Mobile Shell

fcppt. Freundlich's C++ toolkit

firesheep. A Firefox extension that demonstrates HTTP session hijacking attacks.

Sozi. A "zooming" presentation editor

GOTT. The infamous "GOTT project" ("GUI on Transparent Technology"; now dead, of historical interest only)

rhino-licensing. A software licensing framework

premake. A git clone of the svn repository of premake

frozen-bubble. Making frozen bubble cross platform

esqlite3. Yet another C++ Wrapper for libsqlite3

libnetpp. A C++ Networking Library implementing protocols for HTTP, (Not implemented: FTP, (E)SMTP, IMAP, POP3...)

libomvtk. OpenMetaverse Toolkit Library

flusspferd. Javascript Bindings for C++