Windows

Exorcist GIF to PNG conversion utility
GltLife Conway's Game of Life for OpenGL
GltChaos 2D Chaos for OpenGL
GltSkybox Panorama Browser for OpenGL
Open Source Games for Windows
Dev-C++ DevPak Downloads

Development

OpenGLUT OpenGL Utility Toolkit
GLT OpenGL C++ Toolkit
GLUI OpenGL User Interface Library
ZPR Mouse Manipulation for GLUT
RSI Font Library for DJGPP/Allegro