The Low Orbit Ion Cannon is a tool commonly used to launch DoS and DDoS attacks. It was originally developed by Praetox Technology as a network stress-testing application, but it has since become open-source and is now mostly used with malicious intent. It is known for being a very user-friendly and accessible tool, and it gained notoriety for its use by members of hacktivist group Anonymous as well as users of the 4Chan forums.
