Sage Math - Sage is a free open-source mathematics software system licensed under the GPL.

Autodesk Fusion 360 - Integrated CAD, CAM, and CAE featuring collaborative editing and cloud-based computation.

Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.

Mathcad - Mathcad is engineering calculation software that drives innovation and offers significant process...

GNU Octave - GNU Octave is a programming language for scientific computing.

Maxima - Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation.