In the mid-2000's I got a Toshiba Portégé convertible laptop off eBay for a few hundred bucks. It had an active digitizer built in and had some software that let you do something similar. It wasn't fancy enough to include alternates and it wasn't the best at connecting cursive, but if you mainly used print/non-script letters like I do, it was a neat trick to be able to use some semblance of my handwriting as a font in Windows.