What Web accessibility evaluation and repair tools are available?

There are a large number of tools that allow Web developers to evaluate the accessibility of their Web pages and sites. Many tools also prompt the developer to make specific repairs. Some tools automatically follow links to evaluate multiple pages within a site or within an entire domain. The Web Accessibility Initiative (WAI®) of the World Wide Web Consortium (W3C®) maintains an extensive list of such tools in their document: Evaluation, Repair, and Transformation Tools for Web Content Accessibility. The WAI makes no guarantee on the quality of all the accessibility evaluation and repair tools on their site, however the list is fairly extensive and the process for finding a specific tool is fairly straightforward.

Although tools such as these can be very useful in identifying accessibility problems, many accessibility issues are subjective and cannot be assessed without manual inspection. For example, a software tool can identify when ALT text is missing, but it cannot determine if the ALT text is appropriate.