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

Calcbar is described as 'Simple modern calculator that doesn't make you mash buttons. Accepts full mathematical expressions, for example:' and is a Calculator in the education & reference category. There are more than 25 alternatives to Calcbar for a variety of platforms, including Android, iPhone, iPad, Web-based and Android Tablet apps. The best Calcbar alternative is OpenCalc, which is both free and Open Source. Other great apps like Calcbar 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.

Integral Calculator is the most popular SaaS alternative to Calcbar.
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.


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.




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

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!

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.


