MATLAB
Commercial
MATLAB (matrix laboratory) is a multi-paradigm numerical computing environment and fourth-generation programming language.
Mathematica
Commercial
Wolfram Mathematica (usually termed Mathematica, Mathematica software suite) is a mathematical symbolic computation program.
Scilab
Open Source
Scilab is an open source, cross-platform numerical computational package and a high-level, numerically oriented programming language.
Maple
Commercial
Maple is a symbolic and numeric computing environment, and is also a multi-paradigm programming language.
GNU Octave
Open Source
GNU Octave is a programming language for scientific computing.
Sage
Open Source
Sage offers business management, bookkeeping & accounting software to meet any business need, from small to midsized businesses.
SciPy & Numpy
Open Source
NumPy and SciPy are open-source add-on modules to Python that provide common mathematical and numerical routines in pre-compiled, fast functions.
Spyder
Open Source
Spyder is the Scientific PYthon Development EnviRonment: a powerful interactive development environment for the Python language with advanced editing.
Compare Freemat with alternatives
Compare Mathematica and Freemat and decide which is most suitable for you.
Compare SciPy & Numpy and Freemat and decide which is most suitable for you.