HttpWatch is an HTTP viewer and debugger that integrates with IE and Firefox to provide seamless HTTP and HTTPS monitoring without leaving the browser window. Change the way that you develop, debug and tune websites today!

Download the FREE Basic Edition of HttpWatch ...
Home: http://www.httpwatch.com/
Download: HttpWatch Basic Edition - Version 6.1.16 (8 MB)
System Requirements:
Windows XP, Vista or 2003/2008 Server
Internet Explorer 6, 7, 8 RC1 or Mozilla Firefox 2.0, 3.0, 3.1 Beta 2