Alternatives to OpalCalc for all platforms with any license





Web / Online

Indie / Classic

Other Platforms

  • SpeedCrunch icon


    SpeedCrunch Portable is a free, fast, high precision open source algebraic calculator with an intuitive interface and a extensive list...

    Open Source Mac Windows Linux

  • Windows Calculator icon

    Windows Calculator

    Windows Calculator, commonly known as Calculator from the application's title bar, is a calculation application included in all...

    Free Windows

  • Soulver icon


    Maths on a Mac as it should be. Soulver is a new kind of calculator application which uses a simple yet powerful word-processor style...

    Commercial Mac

  • Qalculate! icon


    Qalculate! is a multi-purpose desktop calculator for GNU/Linux. It is small and simple to use but with much power and versatility...

    Open Source Linux Xfce

  • galculator icon


    galculator is a GTK 2 / GTK 3 based calculator with ordinary notation/reverse Polish notation (RPN), a formula entry mode, different...

    Open Source Linux BSD Xfce

  • Calculator Plus icon

    Calculator Plus

    Calculator Plus is a nice addition to hundreds of Calculator apps but with unique idea and innovative and user friendly designed...

    Free Android

  • Notepad Calculator

    For jotting down quick calculations. Mix free form text with calculations and see the results appear in the right hand margin as you...

    Open Source Web / Cloud

  • CCCalc icon


    CCCalc is a calculator with tape, you can correct any printed character with, and the tape recalculates everything itself. ...

    Free Windows

  • SimpleCalc icon


    A calculator written in C#.NET 3.5 that aims to be simple and usable. Future plans include functionality above and beyond that of the...

    Free Windows

  • Ruvenss Calculator icon

    Ruvenss Calculator

    Simple yet very effective calculator with print capabilities and log registration.

    Free Mac Windows Linux Chrome OS

  • Numeric Notes icon

    Numeric Notes

    Numeric Notes – is not just a totally new way to count, but also possibility to keep and share calculations on your Mac. ...

    Commercial Mac

  • InstaCalc icon


    An online calculator that allows the free form mixing of numbers and words, and saves calculations automatically.

    Free Web / Cloud

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  • Calculator plus1 icon

    Calculator plus1

    Features a calculator: Standard arithmetic. The calculation of trigonometric functions in degrees radian. Calculation of the...

    Free Android Android Tablet

  • Omni Calculator icon

    Omni Calculator

    Omni Calculator is a web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index...

    Free Web / Cloud Android iPhone iPad

  • Wakari icon


    Wakari provides web-based Python data analysis via embedded iPython notebooks. Embedded IPython Notebook Work in the cloud with...

    Freemium Web / Cloud

  • GlassCalc icon


    GlassCalc is a free, Windows calculator designed for quick input via keyboard. It forgoes the usual array of buttons for a single...

    Free Windows

  • CalcNote icon


    CalcNote is the the notepad calculator designed for the smart phone. You can immediately obtain a calculation result while allowing...

    Free Android

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