Sites like gbdev.io

A blog of overcomplicated DIY hardware projects, such as Lego marble runs, wooden Game Boys and macro keyboards, with original music

mGBA, a free open-source Game Boy and Game Boy Advance emulator project, with release notes and development builds

GB Studio is a drag-and-drop game creation tool for making Game Boy games, with visual scripting and no coding required

Megan Sulli's personal blog and site on software development, developer education, tech tutorials, and personal projects

Technical writings by Rodrigo Copetti on the architecture of video game consoles and handhelds, from the PlayStation to the Wii U

A community hub for Game Boy Advance homebrew development, with game jams, chat channels, and tutorials including the Tonc guide and gbadoc

A game development news blog by Mike Jennings covering engines, tools, free assets and tutorials

Pubby's Stuff, a personal portfolio of homemade retro game projects and programming languages by developer Pubby, covering NES, GBA and web work

Warzone 2100, a free open-source 3D real-time strategy video game with downloads for Windows, macOS and Linux

Personal homepage, blog and file archive of Linus Åkesson in Lund, Sweden, with SID music search and demoscene projects

A personal blog by Nicole Express on vintage technology, mainly retro video game consoles, arcade boards and old computers

tilde.town is a shared Unix community server where members host personal homepages, with ASCII-art branding and member pages

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

Junker HQ is a personal site by Artemio Urbina presenting open source retro gaming tools, translations, music arrangements and essays

Godot Engine, a free open-source 2D and 3D game engine with a project blog and forum, with news by Thaddeus Crews and others

A documentation site for pytest, the Python testing framework, with a list of talks, books and tutorials about it

viznut is the personal website of Finnish demoscene programmer Ville-Matias Heikkilä, with essays, bytebeat music experiments, and game projects

Archive Team, a volunteer collective of rogue archivists saving endangered websites and digital heritage, documented on its MediaWiki wiki

MarkText is a free, open-source real-time WYSIWYG Markdown editor desktop application, with its user documentation

Australian embedded systems company Cybdyn Systems offering custom electronics design, manufacturing, testing, prototyping, software development, and product distribution, with a web shop

Tiled, a free flexible level editor for designing 2D game maps, with its news and documentation pages

A free open-source emulator that runs original Xbox games on Windows, macOS, and Linux, with documentation for its setup

Pilotmoon Software, a one-person Mac software business run by Nick Moore, making PopClip and utilities with a blog

Heliosphere Comic, a biopunk webcomic by Ben Jelter told in chapters and books

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

A Linux distribution called PikaOS, built on Debian Sid with a custom kernel and rolling updates for gaming and development

IINA, a free open-source media player app for macOS with JavaScript plugin support, built on mpv

Thorium Browser, a fast Chromium-based web browser for Linux, Windows, macOS, Android and Raspberry Pi, with developer tools and demos by its maker

A Spanish-language portal and wiki on abandonware, the old video games no longer sold or supported, run by AbandonSocios

An open-source Xbox 360 emulator project, with its official website, updates, FAQ and roadmap, started by developer benvanik

An open source PlayStation 2 emulator project, with a website carrying its blog posts and project information

Viktor's personal blog on search engines, web tools, self-hosting and small-web projects, with posts in English

The Rust Programming Language project's official site for the Rust systems programming language, with documentation, learning resources and community pages

Serebii.net is a fan-run Pokémon news and reference website covering games, anime, GO, LEGO, and event giveaways

qutebrowser is a keyboard-focused, minimal-interface free web browser built on Python and Qt, licensed under the GPL

Libretro, a project and website for the crossplatform application API behind the RetroArch emulator frontend, with news and forums

Playnite, an open source video game library manager that unifies games from Steam, Epic, GOG and other stores

Helix, a modal text editor written in Rust with multiple selections, tree-sitter and LSP support

TanStack, an open-source collection of headless web application libraries and tools, with a design system, blog and chat app

Game File, a newsletter on the business and culture of video games by journalist Stephen Totilo

Vite, a frontend build tool and documentation site for modern web application development, with team and event pages