Recently, I needed a calculator. My tastes tend toward big buttons, an attractive interface, and an RPN (stack based) calculator. Most importantly, I wanted something that would load quickly and work reliably.
Gamelan listed a few calculators, which I checked out. For whatever reason, none of them suited my tastes. Some were too small, some were too meek, and all of them were ugly.
Here's something a little different. This calculator is RPN, with the top five elements of the stack shown at the top. All of the keys work as expected, including backspace. There's even a blinking cursor! I couldn't quite get it down to a single class, but it's close.
Back to The Old Stuff,
or maybe you want to mail Adam.