Calculations
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FreeMat
FreeMat
Open source numerical computing environment
FreeMat is a free open source numerical computing environment and programming language, similar to MATLAB and GNU Octave. In addition to supporting many MATLAB functions and some IDL functionality, it features a codeless interface to external C, C++, and Fortran code, further parallel distributed algorithm development (via MPI), and it has plotting and 3D visualization capabilities.
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Gnu Octave
Gnu Octave
Open Source Computation Tool
GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation. Octave is normally used through its interactive command line interface, but it can also be used to write non-interactive programs. The Octave language is quite similar to Matlab so that most programs are easily portable.
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KAlgebra
KAlgebra
Open Source Calculator
KAlgebra is a calculator with symbolic and analysis features that lets you plot 2D and 3D functions as well as to easily calculate mathematical expressions. KAlgebra is a MathML-based graphic calculator, thought to bring to the user its power by solving expressions written in MathML or calculating converted common equations to MathML.
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SpeedCrunch
SpeedCrunch
Open source desktop calculator
A fast, high-precision and powerful desktop calculator.
Download available for Linux, Windows or Apple Mac OS X. Learn More...
Using SpeedCrunch you type the expression that you want to calculate and press Enter. You can paste the expression from the clipboard (that you copied from somewhere else) and you can copy the last calculation result to the clipboard using Ctrl+R. -
GraphCalc
GraphCalc
Open Source Calculator for Windows
GraphCalc is an open source computer program that runs in Microsoft Windows and Linux that provides the functionality of a graphing calculator.
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