SageMath is described as «free open-source mathematics software system licensed under the GPL. It builds on top of many existing open-source packages: NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, R and many more» and is a very popular app in the education & reference category. There are more than 50 alternatives to SageMath for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is GNU Octave, which is both free and Open Source. Other great apps like SageMath are Jupyter, R (programming language), MATLAB and Mathematica.SageMath 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 SageMath.