Scilab is described as 'Is free and open source software for numerical computation providing a powerful computing environment for engineering and scientific applications. Scilab includes hundreds of mathematical functions' and is a very popular numerical computation software in the education & reference category. There are more than 50 alternatives to Scilab for a variety of platforms, including Windows, Linux, Mac, Web-based and BSD apps. The best Scilab alternative is R (programming language), which is both free and Open Source. Other great apps like Scilab are GNU Octave, MATLAB, Jupyter and Mathematica.