Are there any tool for monitoring HTTP response?

Question

Are there any tool for monitoring HTTP responses? so open such tool up. give it URL. And it goes to it and brings you back not only body of http response but all http response.

Answer 1

Fiddler2

http://www.fiddlertool.com/fiddler2/version.asp

Fiddler acts as an http proxy, it lets you examine outgoing requests and incoming responses (raw headers, data, everything). It also lets you change requests, resend them and manipulate them directly. It is invaluable.

_{(source: fiddler2.com)}