Widelands is a free, open source real-time strategy game
Flexible level editor
Cocos simplifies game creation and distribution with Cocos Creator
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Cross-platform, open source, and super fast MUD client with scripting
Home theater software and entertainment hub for digital media
A game engine with an emphasis on real-time cutting-edge solutions
A tool for converting Xbox 360 shaders to HLSL
A multi core friendly rigid body physics and collision detection lib
3D game engine with lua scripting
A fast and reliable entity component system (ECS) and much more
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform 2D and 3D game engine with modular architecture
Botcraft is a cross-platform C++ library to create bots
A game of dungeon exploration, combat and magic
RPG Maker 2000/2003 and EasyRPG games interpreter
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Universal Triggerbot All Games Download
Command and Conquer: Red Alert original source code
lua dev plugin for unreal engine 4 or 5
An Open Source DOS emulator to run old DOS games
Universal ESP All Games Download
VR Mosaic - C++ Builder Applet v.2.5
SDL library for Android, including several games.