It's called Child Control 2007. I just came across it as I was researching other software I can recommend for my clients, and thought those here may have a use for it.
I am NOT a paid representative of the company that produces this item, nor am I attached to said company in ANY WAY.
http://www.salfeld.com/software/childcontrol/index.htmlGive children an “allowance” of timeChild Control 2007 keeps track of the time your kids spend in front of the computer. Once their time is up, the computer automatically shuts down and won’t start up again—something any kid can understand. Our experience has shown that Child Control 2007’s verdict is accepted without arguments—there is no debate and no discussion. Another way of looking at it: “Child Control gives your kids back time that they are then free to spend in other ways.”