2nd Millennium Invisible 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, select it, and press the hotkey (by default it is Ctrl + F11). The result will be substituted in the document.
Solution Solver
Spend your time accomplishing your primary work and let Solution Solver assist you. Solution Solver can perform dilution equations, conversions, solution problems, radioactive decay equations, and much more!
Electrical Calculations
Electrical Calculations software provides calculations and ratings for busbars, cable, power factor correction, motor starting, enclosure ventiation and many metric / imperial conversions and constants.
Midget
Tiny but smart calculator: just type in any expression, like "2+3/7.1-3sqr 5", and hit Enter; then modify it and evaluate again without re-entering everything. 18-digit precision, 30 functions, 12 memories, fractions, deg/min/sec, more!
RecBook
RecBook is a very easy to use Bankbook Reconciliation Calculator designed for those with even the least amount of computer experience.
FNA
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.