Fiddler - The Free Web Debugging Proxy Posted by urlwolf on Sunday May 19, 2013 @05:51AM from the fiddler2.com dept. http://fiddler2.com/ ( 3 comments | 4 points | on HN )
I have not tried it myself. The price is not too bad but for something that I only occasionally need, I prefer a free solution. Fiddler seems to fit the bill as long as you have a Windows machine/VM to install it on.
http://portswigger.net/burp/