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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.

  • Full Control for Complex IT - Try PRTG Now Icon
    Full Control for Complex IT - Try PRTG Now

    Gain deeper insights and proactive alerts for your entire network. PRTG empowers you to optimize uptime and prevent costly outages.

    As an IT monitoring expert, you need more than basic alerts - you need actionable data and full transparency. PRTG gives your team a single pane of glass for all systems, devices, and applications, with customizable dashboards and granular user management. Detect issues before they escalate, automate reporting, and ensure compliance with SLAs. PRTG’s scalable engine and advanced analytics help you optimize resources, reduce manual effort, and keep your organization running smoothly. Take control of your IT landscape and make smarter decisions with real-time, enterprise-grade monitoring.
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  • Create and run cloud-based virtual machines. Icon
    Create and run cloud-based virtual machines.

    Secure and customizable compute service that lets you create and run virtual machines.

    Computing infrastructure in predefined or custom machine sizes to accelerate your cloud transformation. General purpose (E2, N1, N2, N2D) machines provide a good balance of price and performance. Compute optimized (C2) machines offer high-end vCPU performance for compute-intensive workloads. Memory optimized (M2) machines offer the highest memory and are great for in-memory databases. Accelerator optimized (A2) machines are based on the A100 GPU, for very demanding applications.
    Try for free
  • 1
    Integrated Development Environment for some microcontrollers based on 8051(e.g. AT89S8253). Supported languages are Assembly and C. It has its own simulator, assembler, editor and many other tools. See the project web site for more details and the newest updates.
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    Downloads: 491 This Week
    Last Update:
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  • 2

    TILP - TI Linking Program

    TI graphing calculators <-> computer communication software

    TILP (formerly GtkTiLink) can transfer data between Texas Instruments graphing calculators and a computer. It works with all link cables (parallel, serial, Black/Gray/Silver/Direct Link) and it supports the TI-Z80 series (73..86), the TI-eZ80 series (83PCE, 84+CE), the TI-68k series (89, 92, 92+, V200, 89T) and the Nspire series (Nspire Clickpad / Touchpad / CX, both CAS and non-CAS). The project is now managed on Github, https://github.com/debrouxl/tilp_and_gfm . It uses the libti* libraries, https://github.com/debrouxl/tilibs . Install script for *nix: https://github.com/debrouxl/tilp_and_gfm/blob/master/tilp/trunk/build/scripts/install_tilp.sh
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    Downloads: 389 This Week
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  • 3
    GraphCalc is a very gui graphing calculator. It has been called a good replacement for a TI-85. It is a must for any high school math student.
    Downloads: 37 This Week
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  • 4
    Finanx 12c

    Finanx 12c

    Financial Calculator

    The Finanx 12c is a free software that mimics the HP-12C financial calculator. This software was developed for educational purposes. IT'S NOT RECOMMENDED using this calculator for professional calculations. If you find any bugs, please, let me know. Click "Bugs" in the menu bar to report bugs found.
    Downloads: 17 This Week
    Last Update:
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  • Turn speech into text using Google AI Icon
    Turn speech into text using Google AI

    Accurately convert voice to text in over 125 languages and variants by applying powerful machine learning models with an easy-to-use API.

    New customers get $300 in free credits to spend on Speech-to-Text. All customers get 60 minutes for transcribing and analyzing audio free per month, not charged against your credits.
    Try for free
  • 5

    ATCalc

    Programming environment. Scientific and graphic calculator.

    From single or scientific calculator to structured programming environment (+- pascal): Input, graphic (display of functions; direct draw; display, capture, etc. of images) functions; tests, ... Ready: visual problems or blind users. See below in the web (http://atcalc.sourceforge.net/)
    Downloads: 22 This Week
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  • 6
    Advanced Trigonometry Calculator

    Advanced Trigonometry Calculator

    Precision Trigonometry: Advanced Calculator for Complex Math

    Advanced Trigonometry Calculator is equipped with a user-friendly interface that allows for easy input of problems and instant computation. Professionals such as engineers who need to perform advanced trigonometric calculations in their work will find this tool extremely useful. More info by clicking below: https://advantrigoncalc.sourceforge.io/ Advanced Trigonometry Calculator was only and always only developed by the Portuguese Renato Alexandre dos Santos Freitas. Also author of poems, reflections and thoughts published on the platform https://www.pensador.com/autor/renato_alexandre_dos_santos_freitas/ ATC is Made in Portugal. He was born in Coimbra on July 6, 1991. He has a degree in Electrical and Telecommunications Engineering and began developing ATC at the beginning of his undergraduate studies. He works for Miclearning, Lda since April 2020. Providing services to Multimac Hito Innovation.
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    Downloads: 8 This Week
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  • 7
    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: 5 This Week
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  • 8
    Extcalc is a multifunctional scientific graphic calculator for linux with features like graph drawing, graph analysis and calculating scientific functions including differentiation, integration and logic functions.
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    Downloads: 21 This Week
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  • 9
    Scientific Java Calculator for cell-phones and MIDP devices
    Downloads: 4 This Week
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  • Cloud data warehouse to power your data-driven innovation Icon
    Cloud data warehouse to power your data-driven innovation

    BigQuery is a serverless and cost-effective enterprise data warehouse that works across clouds and scales with your data.

    BigQuery Studio provides a single, unified interface for all data practitioners of various coding skills to simplify analytics workflows from data ingestion and preparation to data exploration and visualization to ML model creation and use. It also allows you to use simple SQL to access Vertex AI foundational models directly inside BigQuery for text processing tasks, such as sentiment analysis, entity extraction, and many more without having to deal with specialized models.
    Try for free
  • 10
    A simple CPU simulator whose goal is to make assembly learning easier. This goal is reached giving a simple calculator, called ENIAC, with a simple CPU, called vCPU. The vCPU's instructions are very simple and easy to understand.
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    Downloads: 7 This Week
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  • 11
    qmol

    qmol

    A simple molecular weight calculator

    qmol is a simple molecular weight calculator, available for Linux and Windows, derived from Tomislav Gountchev's KMol. You can enter a formula, (e.g. CH3(CH2)2OH) and get its molecular weight (60.0959 g/mol) and its elemental composition (C3H8O: C 59.96; H 13.42; O 26.62 %). See the features list below for more details or consult the wiki page: https://sourceforge.net/p/qmol/wiki/Home/. For Windows binary and source code see the files section: https://sourceforge.net/projects/qmol/files/ Binary packages (rpm/deb) for openSUSE Leap 15.2-42.2, xUbuntu 20.10-19.10, 17.04, Fedora 33, CentOS 8, Scientific Linux 7, and Debian 10.0-8.0 can be found at: http://download.opensuse.org/repositories/home:/lineinthesand/
    Downloads: 4 This Week
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  • 12
    BigAl

    BigAl

    a free cross platform calculator for calculating BIG numbers

    BigAl is a free open source and platform independent software for calculating really BIG numbers. It supports not only standard arithmetic, but also exact period determination, predefined factorials, fibonacci with seeds, factorization, nth root, etc
    Downloads: 8 This Week
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  • 13
    pfcalc is a pipe friction calculator using the Darcy-Weisbach equation. gpfcalc is a Gtk front-end for pfcalc. Qpfcalc is a Qt front-end for pfcalc.
    Downloads: 8 This Week
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  • 14
    EVAlgebra -  Clifford algebra calculator

    EVAlgebra - Clifford algebra calculator

    A simple Clifford algebra calculator

    EVAlgebra , symbolic Clifford algebra calculator (geometric algebra) , is an Eigenmath adaptation. EVAlgebra support space dimension from 1 to 4 with arbitrry signature. It is fully documented at evalgebra.org. You may write your own scripts to resolve specific problem.
    Downloads: 4 This Week
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  • 15
    Visual ExpressionCalculator
    Visual ExpressionCalculator is a cross-platform fractional expression, fraction and mixed number calculator / кроссплатформенный калькулятор дробей, смешанных чисел и дробных выражений
    Downloads: 4 This Week
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  • 16

    Leibnitz

    Electronic paper for computations and graphs

    Leibnitz is the calculator you've always wanted (even if you didn't know it!), short of handwriting recognition. FAQ: https://github.com/jafl/jx_application_framework/tree/master/programs/leibnitz#readme ChangeLog: http://leibnitz.sourceforge.net/ChangeLog.html
    Downloads: 7 This Week
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  • 17

    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: 3 This Week
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  • 18
    Photon

    Photon

    A graphing calculator that's both powerful and easy to use.

    Photon is a fully functional graphing calculator capable of numeric calculations as well as graphing functions, including parametric and polar graphs. In addition to regular graphing, Photon can plot integrals, first and second derivatives, tracing, animation, matrix math, and degree / radian mode. Photon can find roots, minimums and maximums, points of inflection, and it can fit several types of best fit lines and curves to data sets. Log and semi-log graphing are also available. Photon can save data to several file types, including images such as .jpg and .png. Display options are also available, including a dark / light theme for optimal visibility from a projector. Photon's primary goal is to be easy to use while retaining a feature-rich design. VB Gadgets brings you Photon - a parametric graphing calculator.
    Downloads: 4 This Week
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  • 19
    Tablet 83 is an easy-to-use calculator based on the _functionality_ of Texas Instruments' TI-83+.
    Downloads: 4 This Week
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  • 20
    Tibi's Mathematics Suite

    Tibi's Mathematics Suite

    A suite of useful mathematical applications.

    The Tibi's Mathematics Suite is a package of various mathematical applications. Included in the package are: a scientific calculator, a graphing calculator, a matrix calculator, and a factorizator. Requirements: .NET Framework 4.0
    Downloads: 4 This Week
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  • 21
    The Fung-Calc is an advanced, yet easy to use graphing calculator that supports graphing in both 2D and 3D. Several different plot types are available and graphs can be animated.
    Downloads: 3 This Week
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  • 22
    CIMA

    CIMA

    Body Mass Index (BMI) and Other Indexes Calculator with Classification

    CIMA is a program that provides an easy way to calculate a diversity of body indexes related to the fat content and energy needs, providing a way to control our weight: 1 - Body Mass Index (BMI), including both the traditional and the new proposed formulas, and provides a classification of the results. The evaluation takes in account the age groups (adults, children and the elderly). 2 - Body Adiposity Index (BAI). 3 - Basal Metabolic Rate (BMR) for Men and for Women. 4 - Body Fat Percentage (BFP). 5 - Total Daily Calories Needs based on the activity levels of the user lifestyle. The program supports 3 languages (English, European Portuguese and Brazilian Portuguese). IMPORTANT: CIMA works only with the International System of Units (SI). No other systems are allowed since SI is the standard one. CIMA may still require a depuration before becoming a mature program, but it is already functional and may be downloaded by anyone.
    Downloads: 2 This Week
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  • 23
    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: 2 This Week
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  • 24
    UltimateCalculator

    UltimateCalculator

    Basic Scientific Calculator

    This software has four major modes- Simple, Scientific, Base & Equation. It also has Unit Converter, Date Calculator & Prime Number Generator.
    Downloads: 2 This Week
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  • 25
    Virtual TI emulates nearly the entire line of Texas Instruments graphing calculators, and offers features that speed up both debugging and testing of calculator programs. Windows version is quite stable but the Linux/OSX version is only in planning.
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    Downloads: 2 This Week
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