Internet Explorer Developer Toolbar

If you haven't tried it yet, give it a shot. Quite neat application that can prove useful when developing websites and solutions for the web in general. Some of the features: View DOM, Disable Cache/Images/Css etc, Outline Div/Table/Images etc, Resize, Clear cache for domain/all etc and a ruler. http://www.microsoft.com/downloads/details.aspx?FamilyID=e59c3964-672d-4511-bb3e-2d5e1db91038&DisplayLang=en Update: If you're a heavy firefox user, go get Firebug for firefox at https://addons.mozilla.org/firefox/1843/ which offers the same functionality (if not better) for Firefox. Thanks crashie!