Tamper Data for Fun and Security
I can't believe I just discovered this now. The Tamper Data extension for Firefox.
TamperData is an extension to track and modify http/https requests. It is great for security testing and just in general trying to break your applications. In fact, if breaking is what you want to do, check out the pre-packaged built in SQL Injections, Cross Site Scripting (XXS) vulnerabilities and other goodies.
