Economy Size Geek

I haven’t had a chance to really dig in - but you have to love a tool that has easy options for XSS built in as menu options - guess the few excuses you have left for not building web apps that survive against the slings and arrows of script kiddies out there are quickly going the way of the dodo.

mozdev.org - tamperdata: index

This extension for Firefox makes it seriously easy to play around with the data you are posting to the site. Now you can really test out how well your web app handles fuzzing and the like.