BetterPhoto.com: Teaches photographers how to take better photos. Includes tips on improving technique, digital imaging, shooting in black and white, camera comparisons, and a Q&A section.
Bob Miller's Light Walk: Learn about unique discoveries in the world of light, shadow and images.
Digital Kids Club: An introduction to digital photography, with tips, lessons and tutorials.
Focus on Photography: Basic Photography with examples: Camera basics, composition, history, types of photography, lighting reference material, and a self-test.
Galaxy Photography: Tips and advice on astrophotography from Jason Ware. Also includes his photos of space and the equipment he uses.
Guide to Kids Digital Camera for Photo Fun and Learning: Offers digital photo ideas for fun and learning using digital cameras various image techniques. Also compares and reviews digital cameras for kids and families.
Making Photographs: A tutorial that focuses primarily on light and subjects and composition. Discusses light, lenses, film, exposure, and cameras.
National Geographic Trick Photography: A site that shows you how to spot trick photography and faked photos.
National Geographic's Photography: Camera Bag: Reveals the tricks and secrets of National Geographic's photo engineering department. Also gives pointers on shooting better photographs.
National Geographic: The Magic of Trick Photography: Find out how photographer Nick Koudis stuffed sardines in a subway, and other ways to fool friends with a camera.
New York Institute of Photography's Tips for Better Pictures: Advice on shooting holiday light displays, photos in low light areas, and other tricky situations. Also offers historical information and a photographer spotlight.
Parallel-Viewing Stereo Photographs: Learn different ways to see photos in 3D. Includes a gallery of 3d images to practice with.
Photo-Seminars.com: Offers free articles covering different photography techniques. Also includes workshops and tips and tricks for paying members.
The Daguerreian Society: Dedicated to the history, science, and art of the daguerreotype; an early photographic process with the image made on a light-sensitive, silver-coated metallic plate. Features galleries, resources, and information.
Thinkquest: Photography 101: Very basic overview of camera types, film types, and a list of suggestions for composing photographs.