by ShowMe Software ProKon is a calculator unlike any you\'ve seen before. It features unit conversions of over 400,000 units, a pop-up scientific/financial/geometry calculator with tape, as well as many calculation modules covering a wide variety of topics.
by J. A. Associates Programmable RPN Calculator, 250+ solutions, 6 unique keypads: Standard, Engineering, Binary, Magnetics, Trig, and Convert (thousands of conversions), with 15 discrete calculators for more complex functions. Easy to learn programming language.
by Virtual Dynamics Org Visual Mathematics, is a Mathematical Visualizer (containing -at least- 67 modules) to learn more and better in less time. Enjoy learning!!! . Get to really Understand what you Study !!!
by ESB Consultancy ESBCalc Pro is a Windows Scientific Calculator with Infix Notation, Exponential Notation, Printing, Brackets, Scientific Functions, Memory, Paper Trail, Result History List, Hexadecimal Conversion, Fraction Conversion and more. Register once for life
by Cole's Computer Programs Numero is a calculator with some nice features. It has a text box that displays all of expressions and answers that have been calculated, and there is eye candy, such as fading in/out and customizable colors.