Sites like aflplus.plus

ecosyste.ms is a set of open source tools and APIs tracking package ecosystem data, documented with OpenAPI specifications

fast-check is a property-based testing library for JavaScript and TypeScript, with documentation and blog posts by maintainer Nicolas Dubien

HackTricks is a multilingual wiki of hacking and pentesting techniques, cybersecurity notes and AI security tricks, maintained as an open-source book

Neovim, a Vim-based open-source text editor project with extensible Lua plugins, documentation and developer resources

conda-forge: a community-run GitHub organization of conda recipes, packages and the Miniforge installer for software distribution

pwndbg is a GDB and LLDB plug-in for debugging, with documentation on setup, commands and features

WhatRoute, a Traceroute and network diagnostic utility for Apple Macintosh OS X, by developer Bryan Christianson

Isaac Freund's blog of status updates and project notes on River, a Wayland tiling compositor, and related Zig tools

Org Mode for GNU Emacs: a plain-text major mode and project site for notes, to-do lists, planning and literate programming

Martin Kleppmann's personal website: blog, conference talks and publications on local-first software and distributed systems by a Cambridge academic

Alpine Linux, an independent lightweight Linux distribution built on musl libc and busybox, with its release announcements and documentation

Andrew Gallant's blog on programming, Rust libraries, regex and CSV tooling, and open source software

Documentation and project site for Passport.js, an authentication middleware library for Node.js applications

The Zig programming language project's website, covering the general-purpose language, toolchain, documentation, and the Zig Software Foundation

Personal blog by EdOverflow, a web developer and security researcher, writing on bug bounty, open source and web security

The official website for Nix and NixOS, covering the reproducible, declarative package manager and Linux distribution, with manuals and learning resources

LIEF, a cross-platform C++, Python and Rust library for parsing, inspecting and modifying executable formats like ELF, PE and Mach-O

Mongoose, an object modeling library for MongoDB in JavaScript, with documentation, changelog, news and plugin listings

A free open source Ruby security toolkit of CLI commands and libraries for security research, by the Ronin project

Lubuntu, the official home of the lightweight Ubuntu-based Linux distribution using the LXQt desktop, with release announcements and community links

A testing framework called Vitest, powered by Vite, with documentation for writing, mocking and configuring JavaScript tests

The aiohttp.org site is the documentation and project page for aiohttp, an asynchronous Python HTTP client and server library built on asyncio

OpenRPC, an open standard and toolkit for describing, testing, and documenting JSON-RPC APIs using a versioned spec document

Gephi, an open-source software project for visualizing and analysing network data through graph layouts, metrics and community detection

A JavaScript testing framework named Jest, documented on its official site, with French and English pages and community help

A security-focused, compartmentalizing desktop operating system based on Xen, with project news, hardware compatibility list and documentation

PDM, a Python package and dependency manager documentation site covering installation, dependency management, building and publishing projects

fastlane is an open source tool for automating mobile app development, screenshots, beta distribution and store publishing

NumPy project website: the official home of the open source Python library for numerical computing and N-dimensional arrays

Selenium, an open-source browser automation tool for web application testing, documented on its official project website

JUnit, a open-source testing framework for Java and the JVM, with documentation, release notes and project information

A project website for PyPy, an alternative implementation of the Python programming language with a just-in-time compiler

Personal web page of Justine Tunney, a software engineer writing on portable executables, llamafile, AI and programming tools

Pterodactyl is a free, open-source web panel for self-hosting and managing game servers in Docker containers

FreshRSS, a free self-hosted RSS and Atom feed aggregator with a blog and project contact pages

Wiki.js, an open source wiki software project for writing and publishing documentation, with versions 2.0 and 3.0