One framework for creating powerful cross-platform games
Desktop/Android/HTML5/iOS Java game development framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open game and rendering engine packed into a JavaScript framework
Cross-platform 2D and 3D game engine with modular architecture
Free and open source real-time strategy game
Voxel game engine in C++ with OpenGL
Map Pixel Art Generator for Minecraft
Java/JavaFX/Kotlin Game Library (Engine)
DeSmuME is a Nintendo DS emulator
Cross-Platform C++ 2D/3D game engine
LayaAir is an open-source 2D/3D engine
An iOS & tvOS Frontend for Multiple Emulators
Flax Engine, multi-platform 3D game engine
A Minecraft mapping tool that creates 3D models of your Minecraft
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Gideros Release version
Powerful, mature open-source cross-platform game engine for Python
3D game engine/framework in C, with Luajit and Python bindings now
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
A charting and data visualization library for Unity
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Doom-based AI research platform for reinforcement learning
3D Procedural Game Engine Using OpenGL