If only it worked on Linux. It's Windows-only: http://bitboost.com/pawsense/.

This software is the only winner so far of an Ig Noble prize in the category of Computer Science: https://www.improbable.com/ig-about/winners/#ig2000. See https://priceonomics.com/the-software-that-detects-when-a-ca... for a write-up.

Apparently this is still maintained, as it is described as compatible with Windows 2000, XP, Vista, 7, 8, and 10 (excepting "Metro/Modern" mode). Written by this charming coder: http://chrisniswander.com/.

[edited for grammar -- and should note that, of course Linux and ilk OS do offer a "cat" command]