Oliver Keyes, 11/11/2015 18:05:
http://accesslint.com/ is similar to the Google page evaluation system, but it looks for accessibility issues. Should be looked at (or something analogous!) with the portal redesign!
http://www.w3.org/WAI/ER/tools/ , linked from https://meta.wikimedia.org/wiki/Accessibility#External_links , links this tool and 55 more!
Nemo