LYGIA, it's a granular and multi-language (GLSL, HLSL, WGSL, MSL, etc.
0 A.D. is a free, open-source, cross-platform real-time strategy game.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
A free 3D game engine to create games and realtimes scenes for Windows
Pycraft is an open-source, OpenGL based game made in Python
Virtual X-Ray Imaging Library on GPU
crossplatform multithreaded object-oriented render and audio engine
Smoothed Particle Hydrodynamics Simulator
3D-Accelerated open-source DOOM engine
non-trivial OpenGL project for research purpose
3D File format viewer/explorer
Java 2D graphics/utility library
A 3D application in which you can move around in space
simple 3d scene viewer for windows/linux/android
Small OpenGL based game enegine
A simple tower defense game
JPEG decompression accelerated on GPU using OpenGL compute shaders
Vehicle simulation with freedom of movement on large map (5x5km).
3D game engine for C and C++