The flexible game engine
Solar2D Game Engine main repository (ex Corona SDK)
Flax Engine, multi-platform 3D game engine
Godot is a powerful cross-platform game engine
Cross-Platform C++ 2D/3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
A game engine with an emphasis on real-time cutting-edge solutions
An OpenGL RTS game engine written in C
Fast and lightweight JavaScript game engine built on WebGL and glTF
Simple and light-weight 3D game engine
Xash3D FWGS engine
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
JavaScript-based game engine designed to empower developers
Zig game engine & graphics toolkit
Unreal Engine Archives Explorer
3D engine with modern graphics
The "Third Way" for Home Assistant Automations
C++ parallel computing and asynchronous networking engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Descent 3 by Outrage Entertainment
A complete 3-D game development suite written in Java
Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc