Wakai CodeTracker is an excellent tool for debugging your Active Server Page and VB COM applications.

With little overhead, you can write debugging information out to the CodeTracker at every step of the way, saving that file locally in HTML or text format, or in the case of Active Server Pages, printing directly on the webpage!

And by using cookies or querystring values, you can print the output in a single browser...while all other browsers pointed at the page never see the CodeTracker output! A must-have for software developers.