lua dev plugin for unreal engine 4 or 5
Gideros Release version
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
A complete 2D/3D Arcade Game Engine for Browser (Blender compatible)
Old-school 2D game engine
Orx: Portable Game Engine
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
The imaginary eight-bit machine
A cross platform Lua based game engine
8-bit Graphical API for Java
Source code of the chapters of the book 3D Game Development with LWJGL
A complete web framework to create online Fighting Fantasy adventures
Portable game engine with main focus on point-and-click adventures
X3D Prototypes for the SMUOS Component
Build Cross-platform Applications
An environment to develop games based on a rectangular board
Asphyre is a cross-platform framework for Delphi and FreePascal.
Event driven concurrent framework for Python