I have been wondering what's the best tool for hacking websites like hackthissite.org? Thanks.
HTS was designed to teach by having the user learning the necessary fundamentals, not by using other people's automated programs.
There is no shortcuts if you want to learn it, follow the answer above .
Theres a good one. Its creativity. Think its on GitHub...
There's a green thing inside your skull, at least should be. That's THE best tool.