Resources
I've found these resources to be very helpful in my color blindness research.
Colorblind Blogs
Color Blindness viewed through Colorblind Eyes: Daniel Flück maintains this excellent blog that is a wealth of information about color blindness. I have found this to be the most comprehensive and active site on the net for color blindness from a color blind person's perspective. The site provides background information, tools and active discussion on color blind issues.
The Colorblind Photographer is another great site with a wealth of information on color and colorblindess. There's some great photography for sale there too!
Color Vision Testing
In addition to the vision testing tools on the Colblindor site, you might find the following useful:
Color Vision Testing Made Easy: An online test from Dr. Terrance Waggoner, who also offers a test kit for $99. You might also check the Colorblind Home Page for more information.
Ishihara Test: This site presents some of the commonly used color blindness test plates, and it also has some useful links to more resources.
CV Test for Aviation: A research article on color vision testing for pilots. Provides a nice background on color vision testing methodologies and compares their effectiveness on a group of subjects.
Color Vision Testing: A detailed slide presentation of color vision testing techniques by Dr. Bernard Blais, Clinical Professor at Albany Medical College in NY.
Color Vision Viewing and Correction
HueVue: That's us! You can use HueVue on an iPhone or iTouch to simulate common color blindness. For people who have weak rather than missing receptors, HueVue can boost the appropriate image components to enhance color vision. HueVue also has tools to compare and coordinate colors.
IDEA Accessibility Simulators for color blindess and cataracts.
Vischeck: Enables viewing of web pages or uploaded images with "colorblind" eyes.
Colour Blindness Simulator: A web-based simulator that allows you to upload your own images and see them as a color blind person would.
Daltonize: This is a specific method of enabling colorblind people to "see" colors. The resulting images are not natural, but they do highlight colors in a way that enables colorblind people to discern differences among them.
Usability
Color Vision Confusion: Some background about what color blindness really is and some specific guidelines to apply when designing web sites and other materials intended to be used by colorblind people. From Burcu Karagol-Ayan at the University of Maryland.
Color Scheme Designer: An excellent online tool for selecting color schemes and simulating vision deficiencies.
Color Science - Color Vision
International Color Vision Society: An international group of physiologists, psychologists, physicists, geneticists, optometrists, ophthalmologists and visual scientists who have a research interest in the many aspects of colour vision and colour vision deficiencies.
Inter-Society Color Council: The ISCC is the principal professional society in the field of color in the United States, encompassing the arts, sciences and industry.
Color Vision: A nice discussion of the evolution of color models and excellent background information on Musell, OSA and CIE color spaces. Brought to you by Bruce MacEvoy, who also publishes a very popular site for watercolor painting.
CVonline: The Evolving, Distributed, Non-Proprietary, On-Line Compendium of Computer Vision, edited by Robert Fisher at the University of Edinburgh.
Munsell Color Science Lab: Rochester Institute of Technology's lab offers a lot of great resources.
Calculators & Developer Tools
IDEA Open Source Tools: ActionScript classes to simulate color blindness and cataracts.
Color Resources: A compendium of some offline software for color conversions.
EasyRGB: Good resource for color calculators and math formulas.