RedCrab is a well designed scientific calculator, featuring a full screen formula editor.
Mathematical expressions are not typed in a typical command line, but can be entered in an editor window quite similar to a piece of paper.
The calculator’s editor supports the entry of complex algebraic equations like fractions, square roots, exponents, etc., for technical and scientific applications.
No installation of the software is required. Just unpack and run it.
RedCrab is a calculator that tries to exploit the power of PC’s, being easy to use, like a pocket calculator, but offering a full screen editor supporting correction, saving and printing functions like those available in word processing applications.
If you start RedCrab from a USB flash drive, your settings are stored on that drive.
(Check also this free Desktop Calculator Gadget)