Resources for Web and DHTML accessibility from both the design and technical perspectives.
AChecker is a tool that allows you to type in a url and test for accessibility.
- W3C complete list of tools
A Complete list of web accessibility evaluation tools
- HiSoftware's Cynthia Says Portal
This site allows you to type in a url and test for accessiblity, and it also allows you to emulate different browsers while doing the test.
- Webaim articles on testing using a screen reader: