lua dev plugin for unreal engine 4 or 5
Desktop/Android/HTML5/iOS Java game development framework
OgreWin3D
Orx: Data-Driven Game Engine
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
evolution for vegastrike SpaceSim/Combat/Trade game
Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
3D Game engine
C++ Framework for slot machine games
An Animated 2D Game in the Turbo Compiler.
A truly extensible cross-platform game engine
cross-platform 2d game engine
Investigo - DX9 Performance and Debugging Toolkit
A cross-platform OpenGL based lightweight scenegraph library
Delphi-like IDE for cross-platform game development
Cross-platform 2D game engine