galculator is a GTK 2 / GTK 3 based calculator with ordinary notation/reverse Polish notation (RPN), a formula entry mode, different number bases (DEC, HEX, OCT, BIN) and different units of angular measure (DEG, RAD, GRAD).

Engineering Calculator is described as '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' and is a Calculator in the education & reference category. There are more than 50 alternatives to Engineering Calculator for a variety of platforms, including Windows, Android, Web-based, iPhone and Mac apps. The best Engineering Calculator alternative is SpeedCrunch, which is both free and Open Source. Other great apps like Engineering Calculator are Qalculate!, fxSolver, Numi and Soulver.
galculator is a GTK 2 / GTK 3 based calculator with ordinary notation/reverse Polish notation (RPN), a formula entry mode, different number bases (DEC, HEX, OCT, BIN) and different units of angular measure (DEG, RAD, GRAD).

PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a...







NumWorks designed an intuitive and evolutive graphing calculator to make learning maths easier.




Calcbot is a simple and beautifully designed calculator for your iPhone, iPod touch and iPad. You’ll never open the built-in Calculator app again.



The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

Unsure Calculator is the most popular Self-Hosted alternative to Engineering Calculator.
NoteCalc is a handy calculator trying to bring the advantages of Soulver to the web.

With MyScript Calculator, perform mathematical operations naturally using your handwriting.




CalcTape is a revolutionary new kind of pocket calculator. With CalcTape, also extensive calculations remain clearly structured. CalcTape makes the arithmetic process visible - you can generate intermediate results and subsequently correct or change all numbers and operations.




handyCalc is a powerful calculator with automatic suggestion and solving which makes it easier to learn and use.



A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:


