Desktop/Android/HTML5/iOS Java game development framework
MAME is a multi-purpose emulation framework
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Drogon: A C++14/17/20 based HTTP web application framework
Powerful, mature open-source cross-platform game engine for Python
A lightweight game server framework implemented with Actor Model
Open Source MMORPG Framework
Flexible level editor
LÖVE is an awesome 2D game framework for Lua
Old style soccer game with many exciting features
Small lightweight program to customize your keyboard
Atic Atac Spectrum Game Remake
KlayGE is a cross-platform open source game engine
A distributed graph deep learning framework.
A framework for developing emulators
A fast, scalable, distributed game server engine/framework for C++
A 2D game engine and level editor
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
WeComeInPeace is a simple RTS game that aims towards multiplayer
Cross Platform GUI Toolkit
Standalone Complete Sudoku puzzle Game Solver Generator for Windows
Build Cross-platform Applications
Highly customizable library for procedural world generation