Home tools are things that come in handy around the household. Check for gaps in your drywall insulation, or verify that your dog's nose is indeed cold, with a Flir thermal camera. If all your cat toys have gone missing try looking behind heavy appliances with a video borescope. Want to calculate the exact cost, monetary that is, of a Netflix binge? Then hook your entertainment center into a multi-outlet energy meter. Or pick up a portable LED projector and watch wherever.