JEP is a Java library for parsing and evaluating mathematical expressions. With this package you can allow your users to enter an arbitrary formula as a string, and instantly evaluate it. JEP supports user defined variables, constants, and functions. A number of common mathematical functions and constants are included.

DesktopCalc is an enhanced, easy-to-use and powerful scientific calculator with an expression editor, printing operation, result history list and integrated help. Desktop calculator gives students, teachers, scientists and engineers the power to find values for even the most complex equation set.

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

WGCalculator is a great replacement for the built-in Windows calculator. Basic features include:
changeable appearance by applying any skin you like, free skin updates, skins can be easily downloaded and installed from within the program with just a few mouse clicks, adjustable window transparency, program minimizes to the Windows system tray, Hotkey controls minimizing and restoring program window, clipboard support.

Numero is a calculator program that does the order of operations, so you can type in the whole expression at once instead of just one number at a time. It has about everything that you would expect to see on a scientific calculator. Also, in addition to the text box that you enter the expression into, Numero has a text box that displays all of the expressions and answers that you have already calculated. The interface is also customizable.

Usually software calculators imitate hardware calculators. It allows Users the ability to quickly start their work with a new program. But with this approach, in regards to the design of software calculators, it inherits all of the defects of hardware calculators. The Extendable Calculator is a different way to approach calculator design. Therefore it does not contain any of the design defects, as outlined above.

Dicom calculates, converts and computes. The first ever calculator of its kind that deals with dimensions of physical quantities in mathematical expression, Dicom, has the answer to expression like: 30 mi./h.+6 ft./s.+15.24 m./s. to ft./s. Dicom can evaluate expressions anywhere in a rich text formatted document. Process your words, numbers, and measurements at one place.

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.

Handy and useful expression calculator and unit converter with skins. Main features: fully customizable interface with skins; keyboard shortcuts; all arithmetic operations, more than 20 functions; editable lists of constants and unit conversions; recalling previously used expressions; five result formats with changeable precision; automatic clipboard copy/paste; minimizes to the system tray.

Sicyon is all-in-one scientific calculator for every researcher and engineer. The core of Sicyon is an expression (VBScript/JScript) calculator with features as: estimate a function using variables, user-defined functions and Sicyon objects; multi-plot/tabulate a function; solve 1-6 equations, min, max and definite integral of 2D/3D function; fit a function; sophisticated units converter; constants database ; matrix oper;plugin tools.

Sicyon is all-in-one scientific calculator for every researcher and engineer. The core of Sicyon is an expression (VBScript/JScript) calculator with features as: estimate a function using variables, user-defined functions and Sicyon objects; plot/tabulate a function; solve a equation, min, max and definite integral of a function; fit a function; sophisticated units converter; constants database; matrix operation; plugin tools.

CalculatorX is an enhanced expression calculator. It can evaluate an expression for one time. You can use Arithmetic, Logic, Bitwise and Relation operations in your expression. And many system constants and built-in functions can also be used in the expression. CalculatorX even supports the custom variables, custom functions and note-line. You can use Binary, Octal, Decimal and HEXadecimal numbers in one expression to evaluate as well.

pmaCalc combines a scientific calculator, binary arithmetik
for programmers, and unit converter in an interesting package.

In addition to a fair range of scientific functions, it has
an unusual numeric stack, and a binary mode that
supports decimal, hexadecimal, octal, and binary arithmetic,
with a full complement of logical operators and bit manipulation
instructions. Unit Converter for 1000+ Convertions, Euro Calculator ...