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Free (as in freedom) open source clone of the Age of Empires II engine :rocket:
openFrameworks is a community-developed cross platform toolkit for creative coding in C++.
Support c++ code for a short computer graphics course
Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.
An open source re-implementation of RollerCoaster Tycoon 2
A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input
Modern C++14 game engine with Vulkan support, fully featured editor and C# scripting
C++11/C++14 and OpenGL graphics engine
LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL), audio (OpenAL) and parallel computing (OpenCL) applications.
A powerful free cross-platform RTS game engine
Collection of one-file C/C++ libraries with no dependencies, primarily used for games
a 2D Game Development Framework