16 function webpage calculator
   Scientific web page calculator, written in JavaScript.
   http://www.onlinecalculator.info

1st Calculator
   Scientific calculator.
   http://www.romanlab.com/1stcalc/

5000 digit calculator
   A calculator that takes calculations out to many, many digits
   http://web.ukonline.co.uk/home52365/bcalc.htm

AddsUp
   PC function calculator that operates in Windows.
   http://www.addsup.net

Advanced Converter
   Program for conversion between units of measurements.
   http://www.mathterra.com/

Archimede
   A powerful calculator for Linux. Algebric, RPN, vectors, matrices, quaternions, System, equations, complex numbers, solution of triangles, measure conversion. License GPL.
   http://mcz.altervista.org/index_in.html

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.
   http://www.bacsoftware.co.uk/fcalc1/

Big Integer Numbers Calculator
   Free download big integer numbers calculator.
   http://www.bigcalc.scriptmania.com/

CLK-Calculator
   RPN Calculator with unit conversion and matirx calculator. Functions for vectors and complex numbers and a function-plotter.
   http://www.clk-calculator.de/

Calculator Directory
   Extensive variety of software calculators collected in one directory. Scientific, graphing, loan and mortgage, currency and conversion calculators.
   http://www.pc-calculators.com

Calculator Express Math Formulas
   Includes arithmetic, mortgage and currency exchange processing features. Uses a dialog box and icons for input.
   http://www.calcexpress.com/

Calculator.org
   Calculator resources including free download of scientific engineering, statistical, and financial calculators.
   http://www.calculator.org/

Calculators by Ken
   Reference programs written in VB3. Includes common mathematical formulas.
   http://www3.sympatico.ca/prentice

Command-line Calculator for tcsh/bash/zsh
   Guide on how to create a simple command-line calculator for the tcsh, bash and zsh shells.
   http://home3.inet.tele.dk/frda/src/calc_tip.html

Constructive Reals Calculator
   An RPN calculator applet and supporting Java library.
   http://www.hpl.hp.com/personal/Hans_Boehm/crcalc/CRCalc.html

Date Calculator
   Perform date math, calculate date differences, and organize data and events.
   http://www.datecalculator.com/

DreamCalc Pro
   Photo-realistic scientific and financial calculator for Windows. Free trial download.
   http://www.dreamcalc.com/

Easy Date Converter
   Adds a number of days to a date, calculates the number of days between two dates, and converts among Gregorian dates, Julian dates, Julian day numbers and ordinal dates of the form yyyyddd. Supports batch computation.
   http://www.hermetic.ch/edc/edc.htm

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.
   http://engcalc.relicad.com

Fung-Calc - Graphing Calculator
   2D and 3D graphing calculator for Linux with multiple graphing modes.
   http://fung-calc.sourceforge.net

GCalc
   An online graphing calculator Java applet.
   http://humblestar.net/GCalc

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

GoldfishSoft
   Free software for the Macintosh. FrakKalk, the newest GoldfishSoft Program, is a fraction calculator for Mac OS X.
   http://homepage.mac.com/goldfish1/

Haxial Calculator
   High precision calculator with unit and radix converters.
   http://www.haxial.com/products/calculator/

HiDigit
   Powerful calculator for students and teachers. Five number systems, full complex numbers support, and 15-digit maximum precision.
   http://www.binarythings.com/hidigit/

High Precision JavaScript Calculator
   A JavaScript Calculator that adds, subtracts and multiplies fairly large numbers. Functions are added in my copious free time.
   http://www.petting-zoo.org/Calculator.html

Jason's Calculator
   The homepage for an easy to use multipurpose shareware calculator.
   http://calculator.8m.net/

MathServ Calculus ToolKit
   Online calculators for several calculus functions.
   http://math.vanderbilt.edu/~pscrooke/toolkit.shtml

Matrix Calculator
   Online Java calculator for matrix operations.
   http://mathematics.ifrance.com/index_gb.htm

Maximath
   Graphing calculator. Includes matrix editor and unit conversions.
   http://www.linesofcomm.demon.co.uk/

Monachos Calculators
   Online calculators with variety of engineering functions, including unit conversion, periodic table, piping applications, and electrical applications.
   http://www.monachos.gr/eng/calculators/calculators.htm

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

My Ten Key
   A realistic ten key calculator designed by a CPA.
   http://www.mytenkey.com/

Online Calculator
   A collection of online calculators
   http://calculator-online.info/

Online Calculators
   A collection of everyday use calculators and converters written in Javascript and PHP, available to use and download.
   http://www.online-calculators.co.uk

Online Matrix Calculator
   Calculates matrix determinant and inverse. Performs LU, Cholesky, QR, SVD decompositions. Calculates eigenvalues and eigenvectors.
   http://www.bluebit.gr/matrix-calculator

PAPCW
   Programmable arbitrary precision RPN calculator. Zip file, download will start immediately.
   http://public.planetmirror.com/pub/cug/vol_400/468_01.zip

PG Calculator
   A scientific calculator with full customizable user interface. Aalgebraic and RPN mode. Windows; shareware trial version.
   http://www.pgcalc.net/

Pocket 16C Calculator
   HP-16C emulator calculator for Pocket PC, by Pirrama Development. Free trial download.
   http://www.pirrama.com/

Pocket Calculator
   Online calculator, written in Java. Includes Square root button and number memory. Source code can be downloaded.
   http://www.df.lth.se/~mikaelb/pocketcalc-enu.shtml

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

Quadratic Equation Calculator
   Calculator for solving a general quadratic equation.
   http://www.1728.com/quadratc.htm

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.
   http://www.computersciencelab.com/RPNCalc.htm

Scientific Advantage Calculator for Pocket PC
   Calculator works with feet-inch-fraction dimensional values and includes advanced math functions, and automatic solvers.
   http://www.advantagecalculators.com/main.aspx?PID=SciProduct

Scientific Calculator
   Javascript calculator with basic scientific functions.
   http://www.creativearts.com/scientificcalculator/

Scientific Online Calculator
   Online math calculator with lots of Scientific functions very easy to use.
   http://poks.org/calculator.html

Scientific calculator with graphing capabilities
   Fornux Calculator is a scientific calculator for Windows that can plot functions and diagrams with many mathematical functions for statistics and algebra.
   http://www.fornux.com

ScriptConsole
   Mathematical calculations using scripts and commands in a console-based multiple-window interface using the Microsoft VBScript engine. Windows; shareware.
   http://www.flashpeak.com/scriptcon

Sicyon
   Online graphing calculator.
   http://www.sicyon.com/

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

SymbMath
   Online calculator, math handbook, symbolic math and Computer Algebra System.
   http://www.symbmath.com

Syntan - a calculator of math functions for Windows.
   A calculator of math functions based on syntax analysis with living graph. Free download.
   http://www.syntan.net/

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.
   http://www.accelware.com/Unit_Conversion_Tool/

UnitMath
   Simplifies calculations involving numbers, units, and precision.
   http://unitmath.com/

Volume of Partially Full Cylinders, Spheres and Cones
   Java applet for partially full cylinder (on side), sphere, and cone.
   http://www.lmnoeng.com/Volume/CylConeSphere.htm

WIRIS
   JAVA applet that allows mathematical online calculations.
   http://calculadora.edu365.com/

Wahoo Software
   Financial desktop calculator.
   http://www.xmlcreate.com/

WebCalc
   Collection of free web based calculators for many subject areas.
   http://www.webcalc.net

Wise Calculator Homepage
   Scientific and engineering calculator for Windows.
   http://pmikh.chat.ru/

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.
   http://x-bc.sourceforge.net

efg's Computer Lab: Cyclic Redundancy Code Calculator
   Lab Report about computing CRC-16 and CRC-32 values using Delphi. Includes links and literature references.
   http://www.efg2.com/Lab/Mathematics/CRC.htm

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.
   http://numerator.sourceforge.net

iFigure
   Guide to online calculators, including those designed for home, travel, finance, health, and small business.
   http://www.ifigure.com/

sCal and sCal2
   Small, open source (free), scientific and engineering, JavaScript-programmable calculators.
   http://scal-2.sourceforge.net