http://www.mystressmanagement.net/download-desktop-destroyer.html

My personal favorite for the occasions when my computer isn't cooperating or I'm feeling mad at someone online (for no good reason, usually). The machine gun is a personal favorite. This is where I get my "*dodges machine-gun fire*" expression from, because I imagine someone shooting at me using one.

To aim it at your person/post/situation of choice, open the folder that contains the file, open it to the welcome screen, then close the folder, bring up your target, bring up the program again, and hit any key. Fire/smash/etc away!

Also fun fact: the hammer changes sound based on the color of the screen. And if you plant termites on the screen, you can kill them with any of the other tools.