The Cynthia Says portal educates users in the concepts behind Web site
accessibility, and the simple, well-designed interface puts accessibility
compliant code within the reach of all users, even those with little or no
knowledge of Web design. The Cynthia Says portal provides feedback to users
in a reporting format that is clear and easy to understand. Accessibility
issues are detected within web sites from Web-based applications, dynamic
pages, or static HTML pages. Users get an immediate "status" of their Web
site accessibility. To find these Cynthia Says utilizes HiSoftware’s
AccMonitor Server technology, through which USER Agents (crawlers/scanners)
collect individual page or dynamic page accessibility data. This information
is then sent to the central server where actual accessibility verification is
performed. The output is returned immediately to the users browser. 

http://www.contentquality.com/cynthia/cynthia.htm
http://www.contentquality.com/