Free C++ Graphics Tutorials
The Official Guide to Learning OpenGL
Free OpenGL book.
Game programming with DirectX
Five chapters for C/C++ Windows programmers who want to learn to write applications that use Microsoft's API, DirectX
OpenGL Tutorials, Demos, Games and More
DirectX FAQ, articles and links.
DirectX Graphics C/C++ Tutorials
Microsoft's DirectX tutorials. Six tutorials covering creating a device, rendering vertices, using matrices, creating and using lights, using texture maps, and using meshes.
Basic Graphics Programming With The Xlib Library
This tutorial is the first in a series of "would-be" tutorials about graphical programming in the X window environment.