From LQWiki

Most graphics libraries are simply wrapper libraries around a output display. For 2D graphics this is usually X, for 3D, its usually OpenGL.

2D Graphics Libraries

• g2
• GGI
• Cairo
• ImageMagick - more of a image processing library, and a complex one at that
• SDL
• Xlib

3D Graphics Libraries

• Crystal Space
• OpenGL
• OGRE
• SDL