Open source library for creative expression on the web, desktop, etc.
PyCAPGE - Python Classic Adventure Point and Click Game Engine
MMIM - Unlimited ideas for Mario Maker Levels!
.NET - VISUAL BASIC NVIDIA +ATI PHYSX SLIMDX DIRECTX 9 -ENGINE/WRAPPER
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
3D game engine for C and C++
Allows the Sourcemod FunCommands to be limited
A cross-platform OpenGL based lightweight scenegraph library
Delphi-like IDE for cross-platform game development
DREAM is an Open Source GCS