Social Engineering Toolkit (SET) is an advanced toolkit that can be found nowadays in the arsenal of penetration testers. This is an advanced toolkit and incorporates many useful social engineering attacks, all in one interface. It is basically a project named devolution and comes bundled along with BackTrack. This toolkit has been written by David Kennedy and is one of the masters of the art of social engineering. The best part about SET is that it can automatically generate exploit-hiding web pages and e-mail messages.