WhatsOpen is a MacOSX utility designed to aid you in determining what is holding your files open. There is a common OSX error when trying to eject removable media relating to files being in use. Often times your files are in use by Spotlight or some other internal system and you don
Quit All quits all running applications, except the Finder, Automator
Force Quit all applications will force quit all applications.
Force empty and delete files in the trash.
It helps you find which apps or system processes keep files open.
iPanic will simulate a Macintosh OS X kernel panic.