Right around the time that Apple released the Newton in the US, UK manufacturer Amstrad followed up with the PenPal. Like the Newton, it featured handwriting recognition along with traditional PDA features like a calendar and address book.
While it was less expensive than the Newton, the one bad thing about the Amstrad was the rubberized case. As you can see in the picture below, heat makes the case sticky. All attempts at cleaning have failed miserably, so you see it as it is. (A handheld with a ruberized case in Texas? What WAS I thinking?)