Akiyoshi's illusion pages: Many works of Akiyoshi Kitaoka. Designs around standard illusions crafted to maximise the illusory effect.
All In Fun Magic: Over 50 optical illusions and ambiguous drawings.
Amazing Eyetricks: Gallery of pictures that will trick your eyes.
Amos Storkey - Visual Illusion of the Month: Collection of illusions and images chosen for novelty and distinction from the usual set found in most collections.
Cool Optical Illusions: A growing collection of optical illusions and eye tricks, including original illusion pictures and a collection of optical illusion desktop wallpaper.
Cut the knot: Visual Illusions: A collection of about 20 illusions - all accompanied by Java applets. Interactively changeable attributes help investigate which ones are in fact responsible for tricking the brain.
Eluzions' Optical Illusions: Contains many optical illusions illustrating a wide range of visual anomalies and surprising optical effects. A free screensaver, posters, and educational explanations are also provided.
Eye Magic: Optical Illusions: Offers a number of optical illusions for viewing, as well as explanations on how they work.
Eyetricks.com: Optical illusions, 3D stereograms and anaglyphs, fractals and brain teasers
Free Optical Illusions Website: A selection of optical illusions including an optical illusion quiz.
IllusionWorks: A multimedia museum of optical and sensory illusions, with online demonstrations and explanations.
Just Optical Illusions: Focus on geometric optical illusions by Gianni A. Sarcone and Marie J. Waeber
Mchael Bach: Optical Illusions & Visual Phenomena: The stress here is on relative novelty and interactivity, in combination with a scientific background. Regularly updated.
Mindfake.com: Site contains a collection of optical illusions, online games, and other fun things.
NBCreations illusions: Illusions by Brincat Norbert for viewing and downloading.
Optical illusion: A large collection of optical illusions.
Optical Illusion Archive: A collection of optical illusion images, 3D street art, and flash demonstrations.
Optical Illusionist: Optical illusions, eye tricks, mind teasers and other puzzles.
Optical Illusions: Amazing Pictures and Effects
Optical Illusions Etc: A collection of various forms of optical illusions with explanations, including illusions conveyed through fractals, architecture, art, advertising and real life encounters.
Optical Illusions for Kids: Offers a collection of illusions, brain teasers, and puzzles for children.
Optical Illusions?: Comments on the terms 'Optical Illusion' and 'Visual Illusion'.
Optical Magic Optical Illusions: A selection of common images.
Optillusions: A collection of riddles and optical illusions of many different forms with thumbnail browsing.
Planet Perplex: Selection of optical illusions, hidden images, impossible objects and upside down images.
Skytopia - Dynamic Optical Illusions: A selection of old, new and original optical illusions. Many pictures are enhanced via the use of 3D and animation.
Subliminal Messages: Impossible figures, optical illusions, multimedia and 3D puzzles.
The McCulloch Effect - An On-line Science Exhibit: