Omni Calculator is a web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index, break-even point, etc. It's very user-friendly, flexible and usable on web, mobile and as an embeddable web widget.




Excalibur is described as 'For Windows 32-bit version is a freeware full featured RPN-only calculator. This is a serious calculator for serious users. Excalibur takes up a small amount of resources for all it does so well' and is a Calculator in the education & reference category. There are more than 25 alternatives to Excalibur for a variety of platforms, including Windows, Android, Mac, Web-based and Linux apps. The best Excalibur alternative is Numi, which is free. Other great apps like Excalibur are GeoGebra Scientific Calculator, Windows Calculator, PCalc and Hissab - Calculator with Superpowers.
Omni Calculator is a web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index, break-even point, etc. It's very user-friendly, flexible and usable on web, mobile and as an embeddable web widget.




Multi Sum Calculator is a portable tool that calculates the sum of multiple values!




ESBCalc is a Freeware Scientific Calculator for Windows with Infix Notation, Brackets, Scientific Functions (Trigonometric, Hyperbolic, Logarithmic - including Base 10, Base 2 & Natural - plus more), Memory, Paper Trail, Result History List and more.

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, functions for converting between degrees and...



XCALC is my little RPN calculator completely free to use, and still downloadable. XCALC is now a DEAD project. No work has been done on this project since 2012, and nothing more will be done either.

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

Moffsoft FreeCalc is the ideal replacement for your standard Windows calculator - with adjustable size, visible memory value and digit groupings, this free calculator software is a simple and intuitive tool.







About A Basic Scientific Calculator Beautifully designed basic scientific calculator with support for percent operation, engineering exponent key, memory functions, and more.
In addition to the widget calculator, a scientific mode is included that links to eCalc’s advanced onlin.

EBTCalc is a Reverse Polish Notation (RPN) calculator that can have custom buttons. Custom buttons are programmed in Javascript with a convenient editor. EBTCalc runs on Windows 10, OSX, and Linux as well as Android. EBTCalc is open source.


Multi Share Calculator is a portable tool that allows anything to be shared proportionally!



Calculator is a simple 4 function calculator, with a panel that has more advanced functions when you need them. It includes history, real time graphing, base conversion, and more. It also comes with a lockscreen widget, a floating calculator, and a wear app so you can use...
It looks like a very limited spreadsheet macro, not a calculator.