Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
aka ogre v2 - scene-oriented, flexible 3D C++ engine
LayaAir is an open-source 2D/3D engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Vulkan-based implementation of D3D9, D3D10 and D3D11 for Linux / Wine
Cross-Platform C++ 2D/3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
A Minecraft mapping tool that creates 3D models of your Minecraft
A game engine powered by python and panda3d
Map Pixel Art Generator for Minecraft
Dust3D is a cross-platform open-source 3D modeling software
A J2ME emulator for Android
Free game engine for development of desktop, mobile, and web games
3D Engine with Blender Integration
Voxel game engine in C++ with OpenGL
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Flax Engine, multi-platform 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
UZDoom is a feature centric port for all Doom engine games
Open game and rendering engine packed into a JavaScript framework
3D game engine with lua scripting
A modular Common Lisp game engine
An iOS & tvOS Frontend for Multiple Emulators
One framework for creating powerful cross-platform games
3D game engine/framework in C, with Luajit and Python bindings now