GeoGebra is an interactive geometry, algebra, statistics and calculus application, intended for learning and teaching mathematics and science from primary sch…

Python(x,y) is a free scientific and engineering development software for numerical computations, data analysis and data visualization based on Python.

SciDAVis is a free application for Scientific Data Analysis and Visualization.

gnuplot is a command-line program that can generate two- and three-dimensional plots of functions, data, and data fits.

Julia is a high-level, high-performance dynamic programming language for numerical computing.

Origin is the data analysis and graphing software.