IE Dev Toolbar

Have you ever wanted to see what your web page looks like at different resolutions? Have you ever needed to View the current DOM in IE or outline the HTML in browser? Are looking for an easy way to Validate your HTML or your links? Downlaod the IEDevToolbar.

http://www.microsoft.com/downloads/details.aspx?FamilyID=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en

This creates a new toolbar in IE and gives you a whole treasure chest of useful tools for analyzing the content of your browser. A must have for anyone building websites.