When redesigning a corporate website for my employer, the following resources where helpful for understanding the WCAG 2.0 AA requirements, then identifying and rectifying accessibility issues.
- Wuhcag is dedicated to making web accessibility clear. The author, Luke McGrath does this by providing concise, easy to follow advice on how to achieve each of the WCAG 2.0 checkpoints. If you sign-up to the newsletter, you can download WCAG 2.0 checklists, so you can tick-off the accessibility checkpoints as you achieve them.
- The WAVE Accessibility toolbar is a browser plugin available for Chrome and Firefox, featuring a number of tools for identifying accessibility issues with websites. I found it useful for discovering missing alt attributes on images and missing labels on form fields.
- The Colour Contrast Analyser from Vision Australia is a desktop app that makes it easy to select colours on a web page or design mockup, to determine whether the colour contrast of foreground and background elements is sufficient for users with colour blindness or other visual impairments.