A real extreme tool is Guantanamo by Aslak Hellesoy, it makes me understand the true meaning of “extreme” 😉

Do you have problems maintaining high test coverage? Send the untested code to Guantanamo!
Guantanamo is a tool that deletes all code lines that are not covered by tests. Guantanamo is part of the Extreme XP Tools family. Some thoughts about why it was created are written down here.