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

Matplotlib is a plotting library for the Python programming language and its numerical mathematics extension NumPy.

QtiPlot is a cross-platform computer program for interactive scientific graphing and data analysis.

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

Storyboard That is a free online storyboard creator.

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