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

Calc is described as 'A simple tape calculator' and is a Calculator in the education & reference category. There are more than 25 alternatives to Calc for a variety of platforms, including Android, iPad, iPhone, Mac and Web-based apps. The best Calc alternative is OpenCalc, which is both free and Open Source. Other great apps like Calc are Numi, Google Calculator, Simple Calculator and RealCalc Scientific Calculator.
A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:

Calzy is a beautiful modern calculator for your everyday use. It helps you perform your day to day mathematical calculation in a more elegant way.




Solve definite and indefinite integrals with ease using our free online calculator. Calculate double and triple integrals and get step by step explanation for each solution.

A calculator for Android.
Algebraic entry. Full on-screen history (multi-line display). Use your phone's keyboard or on-screen buttons. Usual functions: trig, log, etc. Parentheses. Copy to clipboard.


CalcNote is a notepad calculator designed for smartphones. You can immediately obtain calculation results as soon as you've added any calculations on a line.


CALCU is a simple, yet beautiful and powerful calculator. Customize the keypad as your need, change theme as your taste, CALCU is the calculator made just for you!
FEATURES




Arity is a calculator app that's fast and simple to use, and powerful.
Features:
open source (Apache 2). tiny (2K SLOC and 50KB binary) user defined functions and variables complex numbers basic function graphing.
UseTool combines converter and calculator in one app and lets you customize the interface by your own taste. We tried to pick for you the most frequently converted values such as temperature, length, area, power etc.




Rule of 3 Calculator is a portable tool that allows you to apply the mathematical Rule of Three in an easier, faster and more practical way!

Real Time Calculator is a practical browser calculator that outputs results in real time!

The debut product produced by Chiu Software Systems is BiM, short for "Bc iMproved". BiM is a calculator alternative to the default OS X calculator and is built on the UNIX program "bc".

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.


