Kali Linux : Penetration Testing Linux OS containing tools to test the security of system or a network.
yepnope.js : A Conditional Loader For Your Polyfills!
XSS Filter Evasion Cheat Sheet - OWASP : This article is focused on providing application security testing professionals with a guide to assist in Cross Site Scripting testing.
DOM Monster Bookmarklet : DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of ...
A passive reconnaissance tool inside the DOM (experimental)