Open Source Desktop Operating Systems Calculators

Calculators for Desktop Operating Systems

Browse free open source Calculators and projects for Desktop Operating Systems below. Use the toggles on the left to filter open source Calculators by OS, license, language, programming language, and project status.

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  • 1
    CRC RevEng

    CRC RevEng

    Arbitrary-precision CRC calculator and algorithm finder

    CRC RevEng is a portable, arbitrary-precision CRC calculator and algorithm finder. It calculates CRCs using any of the 113 preset algorithms, or a user-specified algorithm to any width. It calculates reversed CRCs to give the bit pattern that produces a desired forward CRC. CRC RevEng also reverse-engineers any CRC algorithm from sufficient correctly formatted message-CRC pairs and optional known parameters. It comprises powerful input interpretation options. Compliant with Ross Williams' Rocksoft(tm) model of parametrised CRC algorithms.
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    Downloads: 143 This Week
    Last Update:
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  • 2
    Precise Calculator
    Precise Calculator has arbitrary precision and can calculate with complex numbers, fractions, vectors and matrices. Has more than 150 mathematical functions and statistical functions and is programmable (if, goto, print, return, for).
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    Downloads: 45 This Week
    Last Update:
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  • 3
    4tH compiler

    4tH compiler

    A Forth compiler with a little difference

    4tH is a Forth compiler with a little difference. Instead of the standard Forth engine it features a conventional compiler. 4tH is a very small compiler that can create bytecode, C-embeddable bytecode, standalone executables, but also works fine as a scripting language. It supports about 95% of the ANS Forth CORE wordset and features conditional compilation, pipes, files, assertions, forward declarations, enumerations, structures, suspended execution, recursion, include files, etc. It comes with an RPN calculator, BASIC interpreter, line editor, preprocessor, compiler, decompiler, C-source generator, a virtual machine, and a multitasking environment.
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    Downloads: 88 This Week
    Last Update:
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  • 4
    fHash

    fHash

    A files hash calculator for Windows and macOS.

    An open source files hash calculator for Windows and macOS. * MD5, SHA1, SHA256 and SHA512. * Drag & drop. * Integrated with context menu in Explorer/Finder. * Support Windows 7 and later. * Support macOS 13 and later, with universal binary. * Support Dark Mode. * English and Simplified Chinese UI. The icon "希" is from hash in Chinese "哈希".
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    Downloads: 20 This Week
    Last Update:
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  • 5

    Geometry Dashboard

    A project to create a simple Geometry Calculator

    I apologize for this, but an accident occurred and all of my GeoDash work has been lost. No updates will be coming. To view all of the files available please click on the 'Browse All Files' link under the 'Big Green Download' button above this description.
    Downloads: 14 This Week
    Last Update:
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  • 6
    The program evaluates ordinal expressions and relations. displaying the normal form output in plain text and/or TeX format. It supports notations for ordinals through and somewhat beyond those definable by the Veblen function.
    Downloads: 13 This Week
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  • 7

    calc: C-style arbitrary precision system

    Calc: arbitrary precision C-like arithmetic & calculator

    Calc is arbitrary precision C-like arithmetic system that is a calculator, an algorithm prototyper and mathematical research tool. Calc comes with a rich set of builtin mathematical and programmatic functions.
    Downloads: 2 This Week
    Last Update:
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  • 8
    A powerfull tool to work with math functions. At this stage of progress it's draw 2D graphs and 3D graphs of any function. Also have very easy to use calculator which can calculate complicate expressions.
    Downloads: 6 This Week
    Last Update:
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  • 9
    Modeline calculator designed to calculate low resolution modelines for CGA, EGA, and VGA arcade monitors, NTSC and PAL televisions, and multisync PC monitors. Supports X11, fb, and AdvanceMAME modeline formats.
    Downloads: 5 This Week
    Last Update:
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  • 10
    mhcfs2

    mhcfs2

    engineering programmable calculator

    MhcFS2 - engineering calculator. (v. 1.2 b141) (math expression calculator, scientific calculator, numerical, integral,integration, derivative, root, matrix, differencial, differentiation, equation, LSE,ODE )
    Downloads: 5 This Week
    Last Update:
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  • 11

    gui scientific calculator

    solves the mathematical expressions with any number of functions in it

    It's a scientific calculator which allows users to enter a mathematical expression with any number of functions in it... it evaluates the result and shows the entered expression with the result.... very friendly environment .. easy to use,also compatible with touch screen laptops.. full scientific calculator..
    Downloads: 1 This Week
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  • 12
    Lincalc

    Lincalc

    A powerful console calculator with a fast and simple interface.

    (Graphical Edition Released, BreezyCalc: http://breezycalc.sourceforge.net/) Lincalc is a console calculator designed to provide a quick and simple interface to a very powerful engine. Its parser is based on muParser <http://muparser.sourceforge.net/>. It supports user-defined variables, logical operators for conditions, and a wide range of mathematical functions each calculation that is made is stored in a result variable (Ans1, Ans2..) and can be referenced in equations. It also supports evaluation of multiple equations each separated by a ','. Conditional Statements: -- Ex. (condition) ? (true val) : (false val) Logic Operators: -- && (and), || (or) Comparison Operators: -- <= (less than or equal to) -- >= (greater than or equal to) -- < (less than), > (greater than) -- != (not equal to), == (equal to) Functions: abs, exp, sqrt, avg, sum, min, max, sign, rint, ln, log10, log2, sin, sinh, asin, asinh, cos, cosh, acos, acosh, tan, tanh, acos, acosh
    Downloads: 3 This Week
    Last Update:
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  • 13
    TRURL

    TRURL

    A suite of RPN calculators and a class library for Object Pascal

    TRURL is a suite of desktop calculators with reverse Polish notation (RPN) written in Object Pascal. Additionally, it comes with a free reusable class library (RPN Engine) as a toolbox for creating your own calculator. TRURL is an acronym for "TRURL is a Reusable Universal RPN Library". Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app for the RPN Engine • TRURL B: RPN calculator in the design of the famous calculators by Dieter Rahms for Braun • TRURL G: Desktop RPN calculator inspired by the UI of the DSKY unit of the Apollo Guidance Computer (AGC)
    Downloads: 3 This Week
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  • 14
    fast powerful CALC
    The fast powerful CALC is a desktop scientific calculator, still is under development and tests. The objective is offer a good and easy to use mathematical tool. I hope you enjoy it.
    Downloads: 2 This Week
    Last Update:
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  • 15
    kalc is a programmable scientific calculator, using RPN (Reverse Polish Notation). Its behaviour imitates a HP48/HP49 calculator. Works with real and complex numbers, unlimited size integers, arbitrary-precision real numbers and more.
    Downloads: 2 This Week
    Last Update:
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  • 16
    Reor Calculator

    Reor Calculator

    Reor is a winsome calculator with loads of functions, by Ajay Menon.

    Reor is a free calculator which is crafted into perfection with a winsome interface. Reor has got Scientific, Statistical, Graphical and many more types of tools built-into it, while maintaining an attractive interface.
    Downloads: 3 This Week
    Last Update:
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  • 17
    Black Spot Leaf Area Calculator

    Black Spot Leaf Area Calculator

    Automated leaf area estimation from scanned leaf images

    Black Spot is a free stand alone software and method to estimate leaf area from images of leaves captured using standard flatbed scanners. This easy to use software allows the user to batch process a large number of samples from multiple species with minimal user input.
    Downloads: 1 This Week
    Last Update:
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  • 18
    CalcuFp

    CalcuFp

    Programmable Calculator (IP functions, create user functions)

    New version: CalcuFP program is a calculator software (beta version), has a wide range of mathematical functions, specific functions for different subjects (ex.- IPv4 functions), Apart from being able to have on hand an wide range of functions, allows to use different numbering systems WITHOUT CHANGING MODES. We can sum operations decimal, binary and hexadecimal mixed. Example. - 25 + BIN ('111 ') + HEX (' FF ') -> this is equivalent to adding the integer 25 +7 (binary) +255 (hexadecimal) = 287. Allows use of predefined variables and constants. Creating user functions. It has a programming section through type pascal scripts (still in testing), It has a multimedia viewer to store documentation that we have on hand for our daily tasks. Aside calculators comes with color coded for resistors, inductors and capacitors. Support matrix calculation. Solving systems of n equations. Periodic table of elements. QR code generator Create new User functions with pascal script.
    Downloads: 1 This Week
    Last Update:
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  • 19
    Calculator++ is an Open source Scientific Calculator app designed to replace the standard Calculator app. Currently in MS-DOS Format.
    Downloads: 1 This Week
    Last Update:
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  • 20
    Cooldt

    Cooldt

    Cool-down time calculator for multi-layers pipe

    Cooldt calculate the cooling duration of a multi-layers pipe in a cold environment. The duration to reach the “Final fluid temperature” or cool-down time (CDT) is calculated by solving the heat equation in cylindrical coordinates with a flux conservative formulation.
    Downloads: 1 This Week
    Last Update:
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  • 21

    Mathematic Formula Calc

    A calculator for doing lots of things.

    A very cool, command line calculator with many functions. You can download it, use it, or change the code (it is open source) as long as it says my name somewhere. Thanks in advance.
    Downloads: 1 This Week
    Last Update:
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  • 22
    Pc Calculator is a clever note and formula editor combined with an advanced and strong scientific calculator. Being an editor it is extremely user-friendly allowing all possible typing and other errors to be easily corrected and fast recalculated.
    Downloads: 1 This Week
    Last Update:
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  • 23
    Calctool is the graphical calculator application that was in the OpenWindows Deskset of the Solaris 8 operating system. Sun Microsystems Inc. have kindly given permission to release it. It incorporates a multiple precision arithmetic packages based o
    Downloads: 1 This Week
    Last Update:
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  • 24

    Ballistic Calculator

    Open Source Ballistic Calculator in C#

    !!! This project is currently CLOSED. There is a new version of API available under LGPL license at https://github.com/gehtsoft-usa/BallisticCalculator1 There is a new version of application in progress (ported to net framework 5.0) https://github.com/nikolaygekht/ballistic.calculator.app Ballisitic Calculator based on JBM's implementation 3-degree of freedom model, ported to C#, improved to support metric system and extended by some math from Litz's "Applied Ballistic" book. Calculator displays ballistic tables, graphs, comparison graph and reticle images. The application is free to use under GNU license
    Downloads: 0 This Week
    Last Update:
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  • 25
    Basic Finnancial Calculator
    Calculadora Financiera Básica, una forma de calcular sencilla y de forma precisa para sus cálculos básicos financieros como: Cálculo de Márgenes de Ganancia y la Porcentual (muy utilizadas para la gente común y comerciantes), la depreciación, cálculo del Punto de Equilibrio, cálculo de Tasas de Intereses y Amortizaciones básicas, cálculo del precio total (¡Incluye Estilo factura en Pantalla!)
    Downloads: 0 This Week
    Last Update:
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