A new version of the Web Accessibility Toolbar has been released. Available for download as Beta 2 the new version features support for Internet Explorer 7 and Vista. Most existing features have been upgraded.
Other new features include:
Open in Firefox and Opera buttons: opens the current page in Firefox or Opera (if installed)
HTML validation quick check: returns summary check results from the W3C Validator.
Frames list: provides access to any framed documents generated source highlighter: generated source views with elements highlighted. Focus highlighter
Functional Accessibility Evaluator