Dave,
I have been using Excalibur as my Windows calculator for a couple of years now and I would like to thank you for putting together such a great piece of software and making it freely available. I have forwarded it to several colleagues who also use it daily. I use it primarily because of the RPN entry, but also because of all the functionality it provides - scientific, statistics, financial, comp. sci., etc, all seamlessly integrated together.
I have tried several excellent HP sim/emulators (semulators?) on Windows, including Nonpareil, Free 42s, V41, etc. While these are also great products, I find myself using Excalibur on a daily basis. Not sure why - I think it's a user interface issue. I guess I prefer to use the actual physical calculators that these *mulations are based upon, while Excalibur seems easier to use on the Windows desktop.
I also like the fact that Excalibur is programmable, although I haven't written as many programs for it as I have for the programmable handhelds. Since I use Excalibur on a PC, I usually resort to other tools for programming on that platform. I find that programming the handhelds themselves is much more useful since I can use the programs away from the PC.
Thanks again for such a useful tool - I highly recommend it to others.
Eamonn.