Sites like box2d.org

Personal blog and portfolio of Allen Chou, a Taiwanese game programmer at Naughty Dog, with game programming posts

Parry, a Rust library of 2D and 3D collision-detection algorithms, with documentation, user guide and API reference

libGDX is an open source cross-platform Java game development framework, with documentation, wiki, news and community game jams

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

Ogre3D, an open source C++ 3D graphics rendering engine with news, community forums, a legacy wiki and support

Open source software libraries and blog for computational design and art by Karsten Schmidt, known as thi.ng

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

Rapier, a documentation and demo site for the Rust 2D and 3D physics engines developed by Dimforge

Thor Vector Graphics (ThorVG), an open-source lightweight vector graphics engine and project site with release notes by Hermet Park

MonoGame, an open-source cross-platform C# framework for game development, run by the non-profit MonoGame Foundation with its news blog

PixiJS is an open-source HTML5 rendering library for interactive 2D graphics, games and cross-platform applications, maintained by a volunteer core team

Redot Engine, a free open-source game engine for creating 2D and 3D games across multiple platforms

A blog and documentation site for BEPUphysics, a free open source 3D physics library written in C#, by its developer Ross Smith

pqxx.org is a personal software project site by Jeroen Vermeulen hosting libpqxx, a C++ PostgreSQL client library, plus other open-source tools

Joona Aalto's blog and project pages on Avian Physics, an ECS-driven physics engine for the Bevy game engine, and Algorust

Computer, Enhance! is a Substack newsletter on programming courses and interviews by Casey Muratori

Bevy Engine, a free open-source game engine written in Rust, with a community catalogue of plugins and learning resources

Lu Wilson's personal site (todepond) with talks, papers, performances, albums and experiments on live coding, tadi web and computer music

A personal blog by Jason McGhee on real-time graphics, global illumination, falling sand simulations and learning to code

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

VirtualGL, an open-source project providing GPU-accelerated 3D rendering to remote X11 clients, with news, documentation and package repositories

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 Rust framework called Yew for building component-based interactive web frontends, with documentation and a playground

vvvv is a visual live-programming environment for .NET, used to build and run large-scale distributed interactive installations, with downloadable packs and a blog

Digital Grove, a Substack newsletter by Ryan Fleury on towards better computers

Castle Game Engine, a free open-source cross-platform 3D and 2D game engine with a visual editor and Pascal API, documented in an online manual

Personal website of Thea "Stargirl" Flowers, a creative technologist and open source advocate sharing her portfolio, talks and tools

Free game assets, tools and games by Kenney, a studio producing 2D and 3D art for game developers

A podcast of candid conversations with game developers about the art, craft, and process of making games, by a developer collective

A C programming library for making videogames, with examples, games gallery and zlib-licensed source code

Xe Iaso's personal website: blog essays, talks, and Twitch VOD archive on making technology understandable, by a technical educator

jMonkeyEngine is an open-source Java game engine with a code-first SDK, documented through a quick start guide and community forums

Karl Zylinski's blog and programming book site on Odin, game development, and low-level engine programming, with contracting services

A cross-platform C library and command-line tools for communicating with iOS devices, developed as free open-source software

The Handmade Network, a community of programmers building software from scratch, with news, a blog and jams

Alan Zucconi's blog of tutorials on game development, shader coding and game AI, plus his books and games

A real-time multiplayer word game where players race to spell the longest word from shared letters

HaxeFlixel, a free open-source 2D game engine for building cross-platform games from one Haxe codebase, with demos, blog and showcase