Elegant Http Debugger
How many times we have struggled to resolve a SSL issue or a strange Flash ActionScript navigation and why it lands on a 404. I have been one such person and I came across a very excellent freeware utility and Help -> About shows that the author is from Microsoft. The tool is called Fiddler.
Fiddler -- A Quick Overview
Fiddler is a quick little tool which helps you by integrating itself with the web browser as a proxy server. Now all your web browser requests are routed through the Proxy Server. Fiddler can capture and display all information including SSL headers (in its 2.0 Avatar (version)). Furthermore, you can tweak with the values and Reissue the requests as well.
Found a bug?
Have you found a bug or have a feature that you would like to get implemented in Fiddler? They maintain a discussion forum over here. Check it out. I am sure this is an inevitable tool for any web developer's toolbox