PG Calculator (Second Edition) 

PG Calculator is a powerfull scientific calculator and an excellent replacement for standard Windows calculator. It ofers full customizable user inteface and looks like real calculator on user desktop. PG Calculator works Algebraic and RPN modes.
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DreamCalc 3 Financial Calculator 

DreamCalc Pro is a software application which provides a fully featured and convenient alternative to using a separate hand-held financial calculator when you are working on your PC. Because it is software, it runs alongside your other applications.
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DreamCalc 3 Scientific Calculator 

DreamCalc is a software application which provides a fully featured and convenient alternative to using a separate hand-held graphing calculator when you are working on your PC. Because it is software, it runs alongside your other applications.
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Simulaworks, System Simulator 

SimulaWorks package is a general purpose simulator, it supports an open set of simulation languages and AI techniques.
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Moffsoft Calculator 

Calculator with tape, financial functions, unit conversions, date/time calculations, and product pricing. Other features include a sizeable display, fixed decimals, totals, item count, multiple memory values, tray icon, always on top, and much more.
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Kalkulator 

Advanced Sci/Eng calculator. Expression evaluation, 18 digits precision, variables, 100 functions, graphs, unit conversion, interpolation, polynomial regression, linear algebra, systems of linear, nonlinear and differential equations, optimization.
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