GNU Octave - GNU Octave is a programming language for scientific computing.
Line Graph Maker - Create a line graph for free with easy to use tools and download the line graph as jpg or png file.
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.
Desmos - A beautiful, innovative, and modern online graphing calculator.
Maxima - Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.