This is a calculator feature comparison. It isn't really a review, because while I do give my opinion once in a while, in general the purpose is to compare what features various calculators have and don't have, to reduce the amount of time someone needs to spend finding calculators that might suit their needs.
One more note, I think I mentioned it in the announcement, but I realize I left it off the page. This page only reviews calculators with an infix mode, so no matter how good an RPN calculator is, if it doesn't also do infix, you won't find it listed here. Maybe I'll expand the list later, but I'm not promising that. If someone would like to contribute a similar comparision for RPN calculators I'd be willing to host it, or if someone would contribute the raw data, I'd be willing to write it up.
It also isn't an impartial review. As much as I try to comment on benefits and shortcomings that other people might see in a calculator, those things that directly affect me are much more likely to be noticed. Consider this comparison authoritative only if you happen to be me. Consider it an accurate guideline if you do your finances with a set of perl scripts rather than Quicken. Otherwise, consider it a set of friendly suggestions.
Every one of these calculators is one that someone will find useful. I won't go so far as to say that there are no bad choices, but there are no choices that are bad for everyone. Use this comparision more to rule out calculators that are missing features that you feel are required rather than trying to decide strictly from this comparison. All of the calculators here have a free review period, and I'd recommend downloading at least the 3 to 5 best fitting calculators you find here. If you take the time to download something, take a few minutes to read the manuals, as several calculators have timesaving features that are unobtrusive enough that you won't find them unless you do read the manual.
This page will probably undergo some updates as I get feedback and corrections, but I will probably not try to keep this page up to date with new versions and new calculators unless they are brought to my attention.