Library of Congress Photo Archive
Dept. of Defense Photo Archive
A History of PhotographyAnalog Photography Users Group
Black Cat Photographic Rules of Thumb
Center for Fine Art Photography
Infrared Photography using a Digital Camera
Lomographic Society International
National Geographic Photography
Photography Tips and Techniques
Scott Kelby's Photoshop Insider
Simon Beedle's Landscape Photography
Smashing Magazine's 50 Superb Photography Techniques
Wildlife and Nature Photography
Center for Disease Control- Public Health
Photocase - Prettying up the world.