Related link: http://longhand.pansophists.net/
At last! A calculator you can type into!
Longhand is a calculator for computer users. Rather than emulating the interface of good old fashioned pocket calculators, Longhand lets you type your calculations just as if you were typing in a terminal.
It can handle trigonometry and multiple bases, and best of all lets you delete and re-type calculations when you go wrong. I’m no mathematician, in fact maths was the subject I dreaded most while I was at school, but I’d imagine this sort of simplicity might be invaluable to those people — scientists, academics, managers and yes, even programmers — who need to have a mathematical mind.
It’s free! Why not give it a try?