Useful Links

Mathworld - The Web's Most Extensive Mathematics Resource.

Animated PNG Samples

POVRay - The Persistence of Vision Raytracer.

FAQSYS - Graphic Gems 1-5. Docs on file formats, compression, fractals etc.

3D Cafe - 3D models, textures etc.

Scene.org - Huge demoscene archive.

256b.com - Hundreds of beautiful 256 byte demos.

World of Escher - Art of M.C. Escher.

efg's Graphics and efg's Image Processing - Great Links Collections.