- Akiyoshi's Illusion Pages
 - Collection of dizzying anomalous motion illusions by Akiyoshi Kitaoka. - Amazing Optical Illusions
- Gallery of classic optical illusions.
- Break.com: Optical Illusions
- Features videos of optical illusions, magic tricks, and amazing card tricks.
- Cool Optical Illusions
- Browse a large gallery of optical illusion pictures, fun eye tricks, impossible puzzles, and ambigrams. Includes incredible perceptual motion illusions, stereograms, amazing hidden images, and some very funny pictures.
- Counter-Rotating Spirals Illusion
- Eyetricks
- Optical illusions and other mind teasing oddities.
- Grand Illusions
- Offers optical illusions, scientific toys, visual effects, and feature articles.
- Jack and Beverly's Optical Toy Collection
- Collection of antique tools for creating optical illusions, such as zoetropes, flip books, and magic lanterns.
- Joy of Visual Perception: A Web Book
- Mark Newbold's Animated Necker Cube
- Applet forcing the viewer periodically switch their perception of a cube.
- Mighty Optical Illusions
- Community blog dedicated to visual phenomena and real life illusions.
- Optical Illusions and Visual Phenomena
- 46 illusions (with explanations) compiled by Michael Bach.
- OpticalIllusions.com
- Gallery of optical tricks and illusions.
- Planet Perplex
- Categorized collection of optical illusions, ambiguous images, impossible objects, puzzles, and hidden images. Also includes related glossary and links. Site in English and Dutch.
- Rotational Illusion
- Examples of pictures that convince the viewer that the objects they're observing are actually rotating.
- SandlotScience.com
- An online collection of colourful optical illusions without a lot of 'deep' science. Includes many interactive demonstrations, science projects, art, books, games, puzzles and more.
- Visual Illusions
- Offers interactive examples of physical, physiological, and cognitive illusions and explains why the eye perceives them as it does. Experiments include colour contrasts, spatial relationships, and peripheral drift illusions.
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