No, I'm very certain I'm not. It was just a simple window, a dropdown of avail apps, and two buttons for start/stop.
It's actually really easy to do the same thing in Terminal.
kill -STOP <pid>
kill -CONT <pid>
For stop/start functions, where <pid> is the numeric process ID. Saved me some hassle when I needed CPU cycles from VMWare or something else unimportant at the time.
䷟䷽䷏䷁ — Dying of the Light.