ThinkPHP Framework
CTFs as you need them
Open source library for creative expression on the web, desktop, etc.
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Game engine supporting many 3D/2D formats and graphic effects
2D Game Engine
Modern 3D engine and IDE written using C# and C++.
A distributed graph deep learning framework.
Source code of the chapters of the book 3D Game Development with LWJGL
Portable game engine with main focus on point-and-click adventures
a game library to develop audio games
Multi-threaded 2D Renderer licensed under the Mozilla Public License
Pear3DEngine is a modern and modular 3D development framework