What is stroke utility?

Out of nowhere I found a checked "stroke" utility at the bottom of the utilities in the Parental Controls that I use to limit my Internet account.

This "stroke" utility was out of alphabetical order, and did not show in the Utilities folder. In 4.5 years I have had the computer, this was never there,

and even if it had been, I would not have checked it, because I would not know what it was. I deselected it, closed System Preferences, and it

came back checked. I did this again, and this time it disappeared. Does anyone know what this "stroke" utility is, and how it could show up like this?

Thanks.