Web Accessibility
Accessible Web Authoring Resources and Education (AWARE)
Shows web designers how to make web sites that can be used by everyone.
Accessible Web Page Design
Lists resources that may be helpful in creating pages that are truly accessible. 
National Center for Accessible Media
Works to make mass media accessible to underserved populations such as disabled persons, minority language users, and people with low literacy skills.
WebABLE!
WebABLE!'s accessibility database lists hundreds of internet-based resources on accessibility.
Web Accessibility Initiative
Created Web Content Accessibility Guidelines. 
Test Web site accessibility here: