OpenGL is the vendor-neutral, multi-platform standard for high performance 2D/3D graphics on devices ranging from mobile phones to PCs to Supercomputers. OpenGl.org is the one-stop hub for all OpenGL news, applications, gamss and developers
As complements to the core set of OpenGL functions, the OpenGL Utility Library (GLU) and the OpenGL Extension to the X Window System[tm] (GLX) provide useful supporting features.
includes sound effects, music, a complete 3D engine, font rendering, a simple Windowing library, a game scripting language, a GUI, networking, 3D math library and a collection of handy utility functions.
remake of the famous DOS-game "stunts". This DOS-game, which was released in the early 1990's, can be downloaded on several abandonware sites, e.g. the XTC site . It is a 3D racing game.
devoted to game / 3D graphics programming with DirectX / OpenGL using C++. Contains downloadable source code for several small and very specific sample programs that I think will be very helpful to anyone trying to learn both 2D and 3D game programming.