Godot Minimal Theme
Eva.js is a front-end game engine for creating interactive projects
Visual Basic 6 2D online adventure game engine
Open game and rendering engine packed into a JavaScript framework
An open source flight dynamics & control software library
A free and open-source Touhou Project fangame
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Complete Open Source and Modular solution for MMO
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Home theater software and entertainment hub for digital media
Stride (formerly Xenko), a free and open-source cross-platform C# game
Godot game template and component-based framework
3D Procedural Game Engine Using OpenGL
3D game engine/framework in C, with Luajit and Python bindings now
Free, cross-platform 2D game engine powered by Haxe and OpenFL
High performance UI layout library in C
Magic Another Game Engine
A multi core friendly rigid body physics and collision detection lib
Ct.js is a desktop game engine that makes learning programming fun
Source code repository of the FreeOrion project
Self-hosted CMS platform based on the Laravel PHP Framework
ThinkPHP Framework
The HTML5 Creation Engine
3D game engine with lua scripting
Skript is a Bukkit plugin which allows server admins