Scientific Calculator
Javascript calculator with basic scientific functions.

iFigure
Guide to online calculators, including those designed for home, travel, finance, health, and small business.

Maximath
Graphing calculator. Includes matrix editor and unit conversions.

URL-Calculator
Web application that evaluates arithmetic expressions embedded in a URL.

UnitMath
Simplifies calculations involving numbers, units, and precision.

Showcalc
Calculator with scrolling tape display.

Fuzzycrawler Scientific Calculator
Javascript-based online calculator.

Scientific Calculator
Javascript scientific calculator using RPN.

Wise Calculator Homepage
Scientific and engineering calculator for Windows.

Wahoo Software
Financial desktop calculator.

Scientific Calculator
Java applet online calculator.

Calculator.org
Calculator resources including free download of scientific engineering, statistical, and financial calculators.

Sicyon
Online graphing calculator.

My Ten Key
A realistic ten key calculator designed by a CPA.

Matrix Calculator
Calculator for basic matrix operations. A demo version download is available.

Printing Calculator by Auroa Binary Systems
Desktop printing calculator. Prints in columns and color on standard-sized paper.

Matrix Calculator
Online Java calculator for matrix operations.

Constructive Reals Calculator
An RPN calculator applet and supporting Java library.

1st Calculator
Scientific calculator.

WIRIS
JAVA applet that allows mathematical online calculations.

MathServ Calculus ToolKit
Online calculators for several calculus functions.

Calculators by Ken
Reference programs written in VB3. Includes common mathematical formulas.

Kalculator for KDE 1.0
Evaluates mathematical expressions. Includes history feature, function-pick window, and help. Variables and hex numbers are also supported.

Quadratic Equation Calculator
Calculator for solving a general quadratic equation.

Multi-Function Calculator
Multi-function shareware calculator, and unit conversion utility for Windows. Four modes of operation: statistics, trigonomety, base-n, and unit conversion.

Date Calculator
Perform date math, calculate date differences, and organize data and events.

Monachos Calculators
Online calculators with variety of engineering functions, including unit conversion, periodic table, piping applications, and electrical applications.

College Financial Calculator
Online financial calculator that determines NPV, IRR, MIRR, PV, FV and amortization schedules.

Akapa Math Calculator
Free software calculator with scrolling tape, financial mode, fractional number (e.g. 1 3/4), and other advanced features.

Volume of Partially Full Cylinders, Spheres and Cones
Java applet for partially full cylinder (on side), sphere, and cone.

BAC Computer Software
Calculator that performs the basic arithmetic operations on fractions and then at the press of a button gives you a detailed explanation of how the computation was done.

VPCalc
Variable-precision floating decimal calculator programmes by Harry Smith.

Advanced Converter
Program for conversion between units of measurements.

DateCalculator
DateCalculator v3.1.0 by Joesoft

MegPegCalc Equation Calculator
Write complex equations, assign results to variables, execute multiple equations using script files, and simulate fixed word length effects.

GoldfishSoft
Free software for the Macintosh. FrakKalk, the newest GoldfishSoft Program, is a fraction calculator for Mac OS X.

Big Integer Numbers Calculator
Free download big integer numbers calculator.

Jason's Calculator
Open source calculator application for the Windows platform.

Calculator Express Math Formulas
Includes arithmetic, mortgage and currency exchange processing features. Uses a dialog box and icons for input.

Programmable Mathematics Freeware
Calculator and numeric system supporting permanent installation of user defined functions and libraries.

Scientific Calculator
Includes arithmetic, square root, exponent, natural log, trigonometry functions. Also, has parenthesis and memory features.

PALM OS Calculator
The calculator is being provided in several versions, depending on the tasks to solve.

High Precision JavaScript Calculator
A JavaScript Calculator that adds, subtracts and multiplies fairly large numbers. Functions are added in my copious free time.

Analysis, a Tool Dedicated to Calculus
Analysis is a tool that can draw 2D and 3D graphs of functions with different characteristics. Implicit f(x,y)=g(x,y)form curves are plot in a xy plane. Free download for all Windows versions

AddsUp
PC function calculator that operates in Windows.

Jason's Calculator
The homepage for an easy to use multipurpose shareware calculator.

RPN Calculator
This Windows programs emulates a fully programmable HP29C RPN calculator that has been augmented with linear curve fit and graphing capability. It was written to serve as a fun introduction to computer programming.

Linear Algebra Calculator
mcalcdos is a free command line linear algebra calculator capable of matrix, vector and polynomial operations in real and complex fields.

5000 digit calculator
A calculator that takes calculations out to many, many digits

Lygea Pocket 15C Scientific Calculator for Pocket PC
HP-15C scientific emulator for Pocket PC.

X-Bc - a GUI to bc
X-Bc is desktop calculator that provides lots of functionality for scientific working. Input and output stay visble at all time for correction and comparation. It's a frontend to bc.

WebCalc
Collection of free web based calculators for many subject areas.

sCal and sCal2
Small, open source (free), scientific and engineering, JavaScript-programmable calculators.

Fung-Calc - Graphing Calculator
2D and 3D graphing calculator for Linux with multiple graphing modes.

GCalc
An online graphing calculator Java applet.

Easy Date Converter
Conversion program that gives the day of the week for a given date.

PAPCW
Programmable arbitrary precision RPN calculator. Zip file, download will start immediately.

Speakeasy
A user-oriented software package that allows non-programmers the opportunity to explore the computational power of their computer. Free trial download.

ESBCalc Pro Home Page
Scientific calculator with many features including Paper Trail. Windows32. Free trial download.

CalcBoard
Calculates expessions using unit conversion and interval arithmetic. Supports numeric values with units and calculations using units, values with errors and interval arithmetics. Windows32. Free trial download.

Command-line Calculator for tcsh/bash/zsh
Guide on how to create a simple command-line calculator for the tcsh, bash and zsh shells.

Scientific and Currency Calculator
Fully functional expression calculator. Linux/Windows versions. Free trial download.

Syberad
A full-function scientific calculator for Windows. Trial download.

PG Calculator
A scientific calculator with full customizable user interface. Aalgebraic and RPN mode. Windows; shareware trial version.

ScriptConsole
Mathematical calculations using scripts and commands in a console-based multiple-window interface using the Microsoft VBScript engine. Windows; shareware.

DreamCalc Pro
Photo-realistic scientific and financial calculator for Windows. Free trial download.

A3Calc
Calculator program for the Nokia 9210/9210i/9290 Communicator: also PC/Windows. EPOC version for sale by post, Windows version is postcardware.

Pocket 16C Calculator
HP-16C emulator calculator for Pocket PC, by Pirrama Development. Free trial download.

Pocket Calculator
Online calculator, written in Java. Includes Square root button and number memory. Source code can be downloaded.

Haxial Calculator
High precision calculator with unit and radix converters.

gNumerator
A interactive computer math system that uses standard JavaScript as the scripting language, and a collection of re-usable math oriented components such as a complete MathML DOM implementation, and a MathML viewing / editing control.

Calculator Directory
Extensive variety of software calculators collected in one directory. Scientific, graphing, loan and mortgage, currency and conversion calculators.

HiDigit
Powerful calculator for students and teachers. Five number systems, full complex numbers support, and 15-digit maximum precision.

Online Matrix Calculator
Calculates matrix determinant and inverse. Performs LU, Cholesky, QR, SVD decompositions. Calculates eigenvalues and eigenvectors.

Syntan - a calculator of math functions for Windows.
A calculator of math functions based on syntax analysis with living graph. Free download.

Math Expression Calculator
Evaluates mathematical expressions involving multiple variables. Offers product description, screen shots and user guide.

The JavaScript Source
A collection of JavaScript calculators to either download for incorporation to a website, or perform calculations on.

SplineCalc
SplineCalc is a multipurpose scientific calculator for implementation of various mathematical operations with maps (grids), data tables, lines, polygons and numbers.

Scientific Advantage Calculator for Pocket PC
Scientific Advantage™ is a Unit Aware™ calculator that lets you work with feet-inch-fraction dimensional values and includes advanced math functions, automatic solvers, and much more. Unit Aware™ means that you can effortlessly compute with units (not just convert).

Archimede - an enhanced RPN & algebric calculator
A powerful calculator for Linux. Algebric, RPN, vectors, matrices, quaternions, System, equations, complex numbers, solution of triangles, measure conversion, etc. etc. License GPL.

PHP Calculators
A collection of advanced statistical analysis calculators including averaging, histograms and sampling.

CLK-Calculator
RPN Calculator with unit conversion and matirx calculator. Functions for vectors and complex numbers and a function-plotter.

Calcs4 online calculations
A library of online calculations for use with your web browser as well as the ability to create your own calculations and publish them to the web for your own use or to share with the calcs4 community.

GCalc -- Java Mathematical Graphing System
Free online graphing calculator for education use with 2d, 3d, cartesian, polar, calculus, differential equations, scientific, implicit function components.

Online Calculators
A collection of everyday use calculators and converters written in Javascript and PHP, available to use and download.

Unit Conversion Tool
Convert between 2200 units in 78 measurement categories. Includes units for length, mass, temperature, volume, area, speed, pressure, energy, power, force, fuel consumption, flow and torque.

ArsenalCalc - expression calculator
An expression calculator which works with real and complex numbers. Supports all basic operation and functions.

PractiCalc Windows Calculator
PractiCalc is a calculator and conversion tool for all 32 bit windows platforms. It provides result of calculations they are typed.

EngCalc Calculator
Calculate and evaluate expressions even by copying and pasting expressions from other applications. It can also read txt (Text) or .doc files automatically line by line.

Online Area Calculator
Online area calculator. Area of the 2d objects square, circle, triangle, parallelogram, rectangle, trapezium, sector. Dynamic calculations.

Harculator
Fully functional graphing calculator built around the Microsoft Office suite.