lua dev plugin for unreal engine 4 or 5
Orx: Data-Driven Game Engine
OgreWin3D
Updated emulator of Forgotten Realms: Unlimited Adventures
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A 2D game engine and level editor
2D ARPG Engine
Open Game Bootstrap
Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
3D Game engine
A truly extensible cross-platform game engine
cross-platform 2d game engine
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine
A cross platform 3d c++ game engine
Basic real-time simulation engine in C++
A small Game Engine project.
Map and logic editor