Godot is a powerful cross-platform game engine
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
One framework for creating powerful cross-platform games
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source HTML5 game framework that offers WebGL and Canvas
Real Time Strategy game engine supporting early Westwood classics
Open game and rendering engine packed into a JavaScript framework
The game engine for everyone
Open Source MMORPG Framework
Self-hosted CMS platform based on the Laravel PHP Framework
Enables Roblox developers to use professional software tools
You can make it - Open Source MMORPG Platform
CTFs as you need them
Gideros Release version
ThinkPHP Framework
lua dev plugin for unreal engine 4 or 5
Arianne is an engine to develop multiplayer online games like Stendhal
INSTEAD - Simple Text Adventure Interpreter.
ReShade is a generic post-processing injector for games and videos.
Molecular viewer and prototyping framework
A free 3D game engine to create games and realtimes scenes for Windows
An isometric arcade-style game of skill, puzzles and exploration
Game engine supporting many 3D/2D formats and graphic effects
TX Library is a tiny graphics library for Win32 written in C++.