Accessibility Extensions for Mozilla: adds features to Mozilla to make it easier for people to view and navigate web content based on the structural markup used to create the web page. It can be used by authors to check their structural markup to make sure it matches the actual content structure of the resource. Accessibility Extensions for Mozilla download
Fangs - Screen reader Emulator Fangs is a Mozilla Firefox extension that displays a text representation of a web page similar to how a screen reader would read it. This helps web developers finding accessibility issues at an early stage in the UI development process.
aDesigner The aDesigner is a disability simulator that helps Web designers make their pages accessible and usable for the visually impaired. Voice browsers and screen readers that read the text on Web pages aloud for people who are visually impaired are often less effective with certain kinds of content, such as highly graphical material. Web developers can use aDesigner to test the accessibility and ease of use of Web pages for people who are blind or low vision. aDesigner download page
A-prompt: A-Prompt (Accessibility Prompt) has been developed to assist Web authors in improving the accessibility and usability of HTML documents. By checking Web pages for barriers to accessibility and making repairs to correct any problems, A-Prompt will ensure that you are reaching the widest possible audience. A-Prompt is based on the guidelines for accessibility which are created and maintained by the Web Access Initiative of the World Wide Web Consortium. Download: http://aprompt.snow.utoronto.ca/
AccessEnable(free online demo) make site-wide automatic fixes as well as interactive fixes to satisfy Federal and other web accessibility standards. http://www.retroaccess.com/index.cgi
Accessibility Valet(free online demo - good) is a core Site Valet tool, dediabsigned to help ensure accessibility by analysing markup for conformance to web accessibility guidelines: specifically the WCAG and Section 508. http://valet.htmlhelp.com/access/
Many of the functions of the Web Accessibility Toolbar started life as bookmarklets. Below are some of the toolbar functions that are not generally available in bookmarklet form.
Please Note: These bookmarklets are only known to work in internet explorer 5+, some may work in other browsers, no guarantees given. Add them to your favorites by clicking (hold left mouse button down) on link text and dragging to links bar.
Shows Table, th td & caption elements on the current page along with recommended attributes for marking up simple data tables(summary, scope). A warning is given if summary ["No summary!"] or scope ["No scope!"] attributes are not present on the appropriate elements.
Shows Fieldset, legend and label elements on the current page. Show the for attribute of the label element if present, displays the text 'NoFor!' if not present. Displays the id [id=""] attribute of form controls, if present.
Color Contrast Analyser color combination tester, allows you choose colors using a color sampler or color pallets or input hex values for foreground and background colors, tells you whether the color combinations provide good/poor visibility See: Color Contrast Analyser
The Colour Contrast Analyser Firefox extension lists colour combinations used in the document in a table that summarises the foreground colour, background colour, luminosity contrast ratio, and the colour difference and brightness difference used in the algorithm suggested in the 26th of April 2000 working draft for Accessibility Evaluation and Repair Tools (AERT). Each element is also listed with its parent elements, and class and id attribute values when specified to make it easier to locate the elements.