Top Alternatives to Microsoft Mathematics

MATLAB (matrix laboratory) is a multi-paradigm numerical computing environment and fourth-generation programming language.

Wolfram Mathematica (usually termed Mathematica, Mathematica software suite) is a mathematical symbolic computation program.

gnuplot is a command-line program that can generate two- and three-dimensional plots of functions, data, and data fits.

Qalculate! is a multi-purpose desktop calculator for GNU/Linux (and Mac OS).

fxSolver is a math solver for engineering and scientific equations.

Matplotlib is a plotting library for the Python programming language and its numerical mathematics extension NumPy.

SymPy is a Python library for symbolic computation. It provides computer algebra capabilities either as a standalone application, as a library to other applications, or live on the web as SymPy Live or SymPy Gamma.

SMath Studio is a freeware, closed source, mathematical notebook program similar to Mathcad.

Graph is an open source application used to draw mathematical graphs in a coordinate system.