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.


ESBCalc is described as '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' and is a Calculator in the education & reference category. There are more than 50 alternatives to ESBCalc for a variety of platforms, including Android, Windows, iPhone, Mac and iPad apps. The best ESBCalc alternative is SpeedCrunch, which is both free and Open Source. Other great apps like ESBCalc are Fossify Calculator, Qalculate!, OpenCalc and Calc You.
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.


Pocket PC calculator for scientific and engineering purposes. This calculator is very bright and easy to use, supports more than 50 functions. The Engineering Calculator has been nominated as the Best Pocket PC Software by Pocket.at in the EUROPE POCKET PC AWARD 2002.
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A modern, scientific calculator that is easy to use. While other calculators display only one number at a time, this one shows you the whole expression you are inputting, leading to a much more user friendly experience.



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...
Complete calculus tools, easy to use and full of functions. Oficalc is, basically, a scientific calculator that may help you with mathematical calculus and that incorporates other tools to send to the highest resolution of advanced operations.




Scalar is a powerful math engine and scripting language, that combines the simplicity of standard tools with the flexibility of scripting. It is much more than a calculator. Thanks to Scalar, defining arguments and functions has never been easier.




Calcbuddy Calculator is an easy to use scientific calculator.
The calculator features:

Solve is a calculator like no other! Solve solves expressions as you type and features an innovative memory system to store and recall answers. Simply touch the answer to store it and touch the stored answer to use it in an expression.



worksheets or practice exercises, calculators & answer sheets to engage the grade school students to learn, practice, test & verify the answers themselves to measure the progress of their own

Ad-free calculator offering basic and scientific computations, including exponents, roots, fractions, and more, with intuitive single-line input, up to 10 decimal precision, viewable and editable calculation history, customizable color themes, and no paid features.



GlassCalc is a free, Windows calculator designed for quick input via keyboard. It forgoes the usual array of buttons for a single textbox where you can type an equation or mathematical expression, hit Enter, and get a result.




Equalizer is a freeware scientific calculator. Instead of the traditional look of many buttons, Equalizer has a simple text line on which you can write the expression in the same way you'd write it on paper, and drawing graphs of equations.


