[bigtunacan]

I haven't used this particular tool, but in general there is a large number of free/open source "hacking" tools available and many can be used for good or ill.

Kali Linux is a prime example. It is a Linux distro prepackaged with some of the best hacking tools available.

While I'm sure some people use it maliciously it is in heavy use by security teams to discover vulnerabilities so they can be fixed.