There was another standalone proggy, written in Ruby (There is a Windows .exe version) and that was, IMHO, one of the better SC calculators and you can use it offline or have it handy to run on anything that runs MS DOS or DOS emulation (I think there's even a way to setup that old HP48GX calculator to run in DOS emulation, although not sure if the program would fit in those 512KB cards
) I'll go check to see if it's still being supported and available for download ...