App Killer is an application that instantly kills all running application with a single click. It's useful when you have several apps crashed and you find yourself having to "Force Quit" them one after the other. It has an intuitive interface and it's very easy to use.
Force Quit all applications will force quit all applications.
AC3 Killer can detect all AC3 movies and convert the audio compatible.
It helps you find which apps or system processes keep files open.
iPanic will simulate a Macintosh OS X kernel panic.
QuitsAppsMBI is a menubar app that can be used to quit all running apps at once.