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

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

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    Melis Platform is an enterprise-grade Low Code Platform simplifying app creation, management, and delivery.

    Ideal for websites, apps, e-commerce, CRMs, and more

    Melis is a new generation of Content Management System and eCommerce platform to achieve and manage websites from a single web interface easy to use while offering the best of open source technology.
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  • 1
    Qalculate! is a multi-purpose desktop calculator for GNU/Linux (now ported to Mac via MacPorts). It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (GTK+). Qalculate! has now moved to GitHub (https://github.com/Qalculate). Get the latest version from http://qalculate.github.io/downloads.html.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 2
    Simple Calculator

    Simple Calculator

    A simple calculator.

    This is a simple calculator written in C++ with the Qt framework, without any extra features. A program for minimalists.
    Downloads: 16 This Week
    Last Update:
    See Project
  • 3
    TTCalc - a mathematical calculator
    TTCalc is an open source bignum mathematical calculator. It features arithmetical functions, trigonometric functions, inverse trigonometric functions, hyperbolic functions, inverse hyperbolic functions, logical operators, logarithms and so on.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 4
    Java multiprecision calculator

    Java multiprecision calculator

    Multiprecision calculator

    Multipresicion calculator, based on Bigdecimal Java class . It has a library (BigMath) that makes calculations with Bigdecimal. It has also an expression parser to parse the user input. It allows you to store user defined variables and functions . You can operate with them to be used for calculations or for creating new functions with composition. With the new version, you can also calculate the derivative of a function. JDK-17 compatibility
    Downloads: 12 This Week
    Last Update:
    See Project
  • Wiz: #1 Cloud Security Software for Modern Cloud Protection Icon
    Wiz: #1 Cloud Security Software for Modern Cloud Protection

    Protect Everything You Build and Run in the Cloud

    Use the Wiz Cloud Security Platform to build faster in the cloud, enabling security, dev and devops to work together in a self-service model built for the scale and speed of your cloud development.
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  • 5
    Java-Calculator

    Java-Calculator

    I believe it is the best tool for everone get it it's free.

    Scientific Calculator includes the following features: * Traditional algebraic or RPN operation * Result history * Math Functions * Percentages * Binary, octal, and hexadecimal conversion * Large input/output display I believe it is the best tool for everone get it it's free.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    This small script currently runs a simple desktop Calculator application. It currently supports the four operations. Simple to run and light on resources.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    Tiny Calculator is a command line calculator for developers. It can resolve a complex expression mixing decimal, esadecimal an binary number. The result is automatic converted in decimal, esadecimal ad binary format.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8

    cgtkcalc

    A simple calculator for complex number calculation.

    A simple scientific calculator for complex number calculation. It requires the GTK+ toolkit.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9

    5NB THC Calculator

    thc % calculator in homemade eddibles

    this program will calculate the amount of THC in your home made eddibles, current version on has options for Flower and Concentrate
    Downloads: 0 This Week
    Last Update:
    See Project
  • Empower Your Contact Center with Human-Like AI Conversations Icon
    Empower Your Contact Center with Human-Like AI Conversations

    Deliver faster resolutions, lower costs, and better CX without hiring another agent.

    Enterprise Bot, based in Switzerland, is a pioneer in Conversational AI, Process Automation, and Generative AI. With the trust of esteemed enterprise giants across industries like Generali, SIX, SBB, DHL, and SWICA, Enterprise Bot is revolutionizing both customer and employee experiences. Through its advanced integration with Large Language Models (LLM) such as ChatGPT and Llama 2, and its unique patent-pending DocBrain technology, the company delivers unparalleled personalization, active engagement, and omnichannel solutions across platforms like email, voice, and chat. Furthermore, Enterprise Bot integrates with existing core systems, such as SAP, CRMs, Confluence and more, and with its proprietary middleware, Blitzico, enables the AI to not only respond to queries but also take action to resolve them. This dedication to innovation in four main use case areas, Customer Support, Sales and Marketing, Knowledge Management and Digital Coworker, elevates both CX and employee productivity.
    Learn More
  • 10
    Angry Calculator

    Angry Calculator

    Angry calculator is a calculator java

    In addition to standard calculator functions, you can perform trigonometric calculations, binary, decimal, hexadecimal. Are included in the calculation of the programs tables, fibonacci, factorial, random number, charting, statistic basic, fast random generator number 1-90, generation and a system for fast calculation of the percentage, calculating the perimeter and area of plane geometric figures. This is also a program to create constant and recall among other functions is also a mini file editor text.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Arrear_Pension_Calculator

    Arrear_Pension_Calculator

    Simple app for calculating arrear pension amount of a given period.

    A simple Arrear Pension Calculator app written in python with GUI specifically Govt. employees (Central & State). This application calculates arrear (Due - Drawn) / overdrawn / recovery of pension between any given periods. This app is not associated with the Govt. This app is for informational purpose only. This project is open source under GNU public license v3.0
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Baculator is a Reverse Polish Notation (RPN) calculator program with an infinite scrollable stack and support for most common mathematical operations as well as some more esoteric operations. Available for Unix/Gtk+, Mac OS X, and MS Windows.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Calx is a calculator program based on RPN (Reverse-Polish Notation) that allows you to compute complex mathematical expressions containing brackets, mathematical functions etc.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14

    Elemental Calculator

    Customization Calculator

    A hand crafted Calculator, made for customisation, fun and a mixed age-range of people. Download today!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    Full Calculator is a calculator with basic mathematical operations, but it has units conversions and temperature conversions too.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    The GD Stock Portfolio Calculator is a Google Desktop gadget used to track how much your financial investments are worth.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Multilanguage calculator for movable holidays (eg. Eastern) on the Sharp Zaurus.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18

    InvisiCalc

    It's a calculator except it is invisible.

    Ever wanted to do a sum without using a calculator? Wouldn't it be great to just type out say, 4*(3+2)/9, in any application and have it replaced by the result? InvisiCalc watches the clipboard for math expressions and calculates any that it finds for you to copy and paste the result!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Java Calculator

    Java Calculator

    Simple, easy to use, easy to learn calculator developed in java swing

    A simple calculator designed to perform calculations of your choice, Pro Calculator also comes with access to customization on buttons and number font.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    KPNClac is a polish notation calculator intended to inspired by the HP48 Series calculators. It handles complex numbers and will someday handle matricies. The next current development version allows user programmable functions via python.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    A little calculator applet for the kicker
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Kalculate provides a user-friendly calculator for the average desktop user. Its focus is to develop features that make it friendly and usable instead of features that provide advanced mathematics.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Programmable scientific desctop calculator, able to work in decimal, hex, octal and binary bitwise logical functions implemented
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    The purpose of this project is to create a graphically pleasing alternative to the calculator that comes default with X11.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Peso Calculator - Portal Clique

    Peso Calculator - Portal Clique

    Calcule seu IMC e saiba se está dentro do Peso Ideal

    Peso Calculator calcula e monitora de forma simples o seu Peso Ideal a partir da fórmula do Dr. Devine (1974) e Índice de Massa Corporal. Calcula também quantidade de energia que você gasta por dia quando em repouso pela Taxa Metabólica Basal ( TMB). É possível salvar os resultados do IMC para acompanhamento posterior e ver se engordou ou emagreceu. Recursos: Faz o cálculo do Peso Ideal através da fórmula Dr. Devine (1974); Faz o cálculo do Índice de Massa Corportal (IMC) de acordo com a Organização Mundial de Saúde; Faz o cálculo da Taxa Metabólica Basal (TMB) pela Equação de Harris Benedict onde é usada para obter o gasto calórico basal diário.
    Downloads: 0 This Week
    Last Update:
    See Project
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