Evaluating Website Accessibility
WebAIM (Web Accessibility in Mind) is an excellent source for information, training, resources, guidelines and standards for web accessibility and disability access to the web, including in introduction to Accessibility Evaluation Tools.
The Six Simplest Web Accessibility Tests Anyone Can Do will give you a sense of how your website performs for people with people with disabilities using six tests that can be done without web development knowledge.
Easy Checks - A First Review of Web Accessibility helps you assess the accessibility of a webpage using simple steps that are designed to be quick and easy, rather than definitive or comprehensive.
WCAG 2.0 Checklist contains guidelines, success criteria, and recommended techniques for satisfying those success criteria.
Automated accessibility testing tools are used to check a webpage or website and quickly identify a number of common accessibility errors. Each tool has strengths and weaknesses, and is likely to deliver different results for the same page or site. Automated tools, by their very nature, interpret the underlying guidelines literally, and cannot check for many content and HTML coding issues. Therefore, it is best to consider the results provided by an automated tool in conjunction with additional manual checks.
AChecker Online Evaluator is a free, open source web accessibility evaluation tool produced by Inclusive Design Research Institute. aChecker supports a wide range of web accessibility standards and guidelines, including Section 508 of the U.S. Rehabilitation Act, WCAG 1.0, and WCAG 2.0. aChecker generates a report of evaluation results and notes about how to repair problems.
FAE (Functional Accessibility Evaluator) analyzes webpages for markup that is consistent with the use best practices for the development of functionally accessible web resources. Developed by the University of Illinois Urbana-Champaign, FAE incorporates WCAG, Section 508 of the U.S. Rehabilitation Act, and the Illinois Information Technology Accessibility Act (IITAA).
WAVE is a free tool provided by WebAIM. Enter a URL on the WAVE webpage and it will return the page you entered with its evaluation layered on top. You can also upload a file or enter straight HTML code to have checked.
Juicy Studio's Luminosity Colour Contrast Ratio Analyser tests whether the contrast between a background color and foreground color is sufficient to meet WCAG 2.0 requirements.