PenguinPlug is an anti-hacking tool that is considered one of the wildest. When the program senses that anyone in the game has a maphack, his units will act strange and start attacking themselves.
SyntaxError recently posted an interview with the creator of the anti-hack program PenguinPlug. He goes by the name 
SuperPenguin. He got inspired by the other StarCraft add-on programmers like Lasgo, TravelToAiur and jca, and decided to comtribute to the community himself. "I've heard about the "hidden function" in the maphack. It helped me to make the most popular feature: the anti-cheat, which is now unavaiable. Many people still ask for it, because they don't know that it's currently impossible".Willing to cooperate with anyone
Apart from his own creation PenguinPlug, they also talk about other systems - BWScanner and the PGTour launcher. He says that they are good programs, however not invincible. He also reveals that he is willing to cooperate with anyone wanting to do fair programs and add-ons to StarCraft, as long as they are serious in what they are doing. PenguinPlug was his first program created in Windows, and says that it took a couple of months to figure it out and learn to program these types of programs.
Links
WGTour.com - Interview with SuperPenguin (Login required)