How can I inspect form data being Posted? [closed]

Question

I am reverse engineering an app and I need to see what is in the post data without viewing the form source. Is a there a decent app/plugin to see what is being posted?

I'm looking for something other then packet sniffing.

Answer 1

Also for Firefox, there are plugins named HTTPfox and Tamperdata that allow you to do more with POST data then firebug. I personally have all three on my work computer.

Answer 2

Fiddler for Internet explorer.