There is a long list of evaluation and repair tools available at:
www.w3.org/WAI/ER/existingtools.html
On this page you can validate the markup code of your pages. A great way to
check the quality of the markup of a website. Validate a page by URL or by file
upload.
http://validator.w3.org
Validate your CSS style sheets by URL, pasting the code in a text box or uploading
the file.
http://jigsaw.w3.org/css-validator/
With this on line tool you can test what a page looks like when not all functions
are supported by a browser. For example, you can test what a page looks like
if style sheets are turned off.
www.accessibility.nl/testen/snoop/
The Accessibility Toolbar gives you many tools to use in Internet Explorer,
for example, the ability to turn off style sheets, outline deprecated elements,
tables, show meta tags, view a page in grey scales.
www.nils.org.au/ais/web/resources/toolbar
The Web Developer Toolbar is an extension for the Mozilla Firefox browser.
This toolbar gives you many options that come in handy when testing a website.
For example it can replace images with alt attributes, point out images without
an alt attribute, disable JavaScript, disable or enable style sheets. It
is also very helpful when testing structural elements for priority 2 of the
WCAG 1.0 guidelines.
www.mozilla.org/products/firefox
The Opera browser makes it easy to toggle images on and off on a web page.
You can also see a web page with different style sheets by choosing Author Mode.
You can then see a page with alternative style sheets, for example a high
contrast style sheet
www.opera.com
WebFormator is a plug-in for Internet Explorer. It outputs a stripped textual version of a website that a speech synthesizer and Braille display use.
The Bartiméus Accessibility Foundation has a collection of bookmarklets
available that helps you test pages in Internet Explorer. A very good bookmarklet
is 01.1. It shows you every image displayed on a web page, with specifics of
the alt attributing (lacking, empty or content of the alt attribute). Note that
not all tools or browser tricks work on pages in a frame set!
