Accessible Website Design: The purpose of this website it to assist developers in creating accessible websites.

Assistive Media: "Assistive Media works to heighten the educational, cultural, and quality-of-living standards for people with disabilities by providing free, copyright-approved, high-caliber audio literary works to the world-wide disability community. The Internet enables Assistive Media to distribute audio effectively, inexpensively, and efficiently. "

Vischeck: This website simulates color blind vision. You can see some examples on this site. This site is worth investigating.

Web Accessibility Initiative: This site provides guidelines that are regarded as the international standard for Web accessibility. Support materials are available at this site to assist developers to build sites that are accessible.

WebXACT: This free online service allows you to paste in a web site and get feedback regarding the quality, accessibility of a given web page.