(There's no video for Calc X yet. Please contribute to MR and add a video now!)
Calc X is two things. First, it's a calculator that has decimal, hexadecimal, octal, and binary functionality. When you switch from mode to mode, an area on the keypad that holds functions specific for your current mode change. For example, in decimal mode, you won't need to enter in the hex value 'A', in hexidecimal mode, you don't need the trig functions, etc.
Second, it's a personal goal of mine to start coding for OS X and Carbon. It's time to ditch the Old Ways and move forward. Carbon helps me build OS 9 and OS X applications at the same time.
Calc-X-1.0.sit (178.07 KiB / 182.34 KB)
Calc X v1.0 / compressed w/ Stuffit
At least 4MB of free RAM
Mac OS 9.x - Mac OS X
Emulating this? It should run fine under: SheepShaver