Any Place Calculator allows you to make calculations in any place where it is possible to enter expressions (e.g. text editor, lines of input, etc.). After starting the calculator, it is automatically placed in your system tray. All you have to do to count an expression in any text editor is to type it, and press the hotkey or click on the tray icon. The result will be substituted in the document.
GraphiCal is a programmable calculator with graphical output which lets you visualize expressions and formulas as graphs in a chart. It has more than 50 built-in mathematical functions, and can integrate and find roots and extrema of functions.
Make conversions from one unit of measurement to another. Includes fluids, weights, distances, areas, circles, temperatures, speed, time, mileage, numerals and fractions. A Custom section lets you "roll your own".
Multi-function calculator and unit conversion utility. Four modes of operation (statistics, trigonomety, base-n, and unit conversion). Many functions, formula entry mode. Up to 26 separate memory registers. Even includes periodic table of elements.
pmaCalc is THE replacement for your pocket calculator. it combines a scientific calculator with a programmer's calculator.
Compact Calculator - CompactCalc
CompactCalc is an enhanced scientific calculator for Windows with an expression editor. It embodies generic floating-point routines, hyperbolic and transcendental routines.