This tutorial file will show you how to use the Accessible Information Solutions (AIS) Toolbar for Internet Explorer. The AIS Toolbar only works in Explorer.
Vision Australia Colour Contrast Analyser 1.0 for Windows:
For accessibility spot checks and HTML validation as well as a full range of accessibility checking for Firefox 2.0 users - both Mac and Win:
Web Developer Extension
Fangs (text based screen reader emulator)
The University of Illinois at Urbana/Champaign Mozilla/Firefox Accessibility Extension