Have you ever wished you could issue simple shell commands through your WordPress interface to, say, quickly change the permissions of a file and then change them back or be able to see what processes are active and kill a process? Have you wanted to have SSH access to your server but your web service does not allow that? Do you have "system" enabled for your PHP? I am not sure if that title does this hack justice but here goes.
This will allow a WordPress user to execute simple shell commands and output them to the browser. It is very incredibly simple, very easy to install and very easy to use. To add security, a user has to be authenticated through WordPress before they are allowed to see this page or use it.
You can read more about it here: