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Desmos - A beautiful, innovative, and modern online graphing calculator.
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...