Calculate the percentage of any number out of any number.
Great little tool to have on anyones desktop.

Math Mechanixs is an easy to use scientific math software program and editor for solving mathematical problems and taking notes, with an extendable function library containing over 200 predefined functions and an integrated function solver, a 2D and 3D graphing utility supporting point labels, zooming, rotation, translation and numerous types of graphs, and a calculus utility supporting single, double, and triple integration and differentiation.

Multimedia Calculator features: New in Version 2 You can select whether to invert the number pad or not whilst using the calculator. Sounds can be turned on or off at will. The colours match the Big Keys Keyboard. Add a +/- sign changing key. The help is a full web browser in a seperate window. Higher contrast display.

HEXelon MAX - free scientific calculator, converter units, currency.

The Acid Library is a .Net Math Parser. Built for maximum performance, it practically eats up the mathematical formulas. It supports everything from the most common mathematical operators, like multiplication and subtraction, to the more advanced functions like cosine and log. With its high speed, the Acid Library raises industry standards for mathematical parsing. It also gives small computers the power to compute large amounts of data.

Math Asst., Calculator, and Hypertext Notepad for Scientists and Engineers using Pocket PC 2003. Assists with calculating networks of formulae, dynamic simulation, differential and linear equation solution, multiple equations and unknowns, builtin script language. Useful for engineering and science computations, trying out algorithms, plotting results, quantitative brain-storming, and documenting problem solutions.

The most powerful Sci/Eng calculator for Windows. Expression evaluation, 18 digits of precision, variables, >100 functions, unit conversion, polynomial roots, interpolation, polynomial regression, linear algebra, numerical integration and differentiation, systems of linear, non-linear and differential equations, multi-argument functon optimization and fitting, curve, point and histogram graphs, statistical operations, computer math (bin/oct/hex).

Calculator.NET is an enhanced version of the standard calculator in Microsoft Windows. It uses RPN (Reverse Polish Notation), which is used by many pocket calculators, e.g. from HP. If you have used a HP 11/28/32/42/48, or any other RPN calculator, you will feel right at home. Some of the enhancements included: RPN, extended function set, and customizable user interface. This program is completely free.

USPExpress Math Parser is a component that is aimed to parse and evaluate scientific, engineering and math expressions on-the-fly. There are .NET and COM editions of USPExpress available.

USPExpress has been widely used in numerous enterprise-level applications in the field of chemical engineering and statistical applications for over 3 years now.

A fun, fully functional tarot themed calculator complete with graphics, animation, and sound. Use your mouse or keypad. Minor Arcana symbols spin and 'tinkle' and startup. Tarot cards replace the standard keys. Keys glow when moused over, magickal sparkles fly up whenever a key is pressed. Fun yet practical, replace your standard Windows calculator today!

To calculate expression, derivative, root, extremum, integral.

Mortgage loan Calculator Calculates monthly payments of a home mortgage loan, based on the home's sale price, the term of the loan desired, buyer's down payment percentage, and the loan's interest rate.
Mortgage loan Calculator also calculates loan, investment and other financial parameters from the cash flows input. Plus Annuity and Math Calculator.