GNU Octave is described as «Octave is a computer program for performing numerical computations which is mostly compatible with MATLAB. It is part of the GNU Project. It is free software under the terms of the GNU General Public License» and is a very popular app in the education & reference category. There are more than 50 alternatives to GNU Octave for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is Jupyter, which is both free and Open Source. Other great apps like GNU Octave are R (programming language), MATLAB, Mathematica and Scilab.GNU Octave alternatives are mainly Programming Languages but may also be Calculators or Statistical Analyzers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of GNU Octave.