Cross-Platform C++ 2D/3D game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Cocos simplifies game creation and distribution with Cocos Creator
Desktop/Android/HTML5/iOS Java game development framework
Flax Engine, multi-platform 3D game engine
Free game engine for development of desktop, mobile, and web games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Map Pixel Art Generator for Minecraft
Cross-platform 2D and 3D game engine with modular architecture
Voxel game engine in C++ with OpenGL
3D game engine with lua scripting
3D Procedural Game Engine Using OpenGL
An example injectable cheat for minecraft using java native interface
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Powerful, mature open-source cross-platform game engine for Python
3D Game engine with editor
Voxel game-creation platform with easy modding and game creation
Multi-platform 2D and 3D game engine
An efficient graphical Minecraft seed finder and map viewer
Free and open source real-time strategy game
Doom-based AI research platform for reinforcement learning
Parabator 2 - Free 3d board game
A free Chess program for Windows with a large set of features
Flexible level editor