Calculators

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

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/

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/

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

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

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

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

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

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

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

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

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. Requires payment after the free trial.
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

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

Jason's Calculator
Open source calculator application for the Windows platform.
http://sourceforge.net/projects/calculator123/

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

Linear Algebra Calculator
mcalcdos is a free command line linear algebra calculator capable of matrix, vector and polynomial operations in real and complex fields.
http://www.angelfire.com/space/matrixcalc/

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

Matrix Calculator
Calculator for basic matrix operations. A demo version download is available.
http://members.shaw.ca/mtx/matrix.htm

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

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

Printing Calculator by Auroa Binary Systems
Desktop printing calculator. Prints in columns and color on standard-sized paper.
http://www.angelfire.com/biz/ccsprog/Calculators.htm

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

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

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
Java applet online calculator.
http://www.mathpad.com/public/htmls/main/left/calc/CalcInfo.html

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

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

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

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/

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

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

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

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

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

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