GnuPlot

Gnuplot is a portable command-line driven interactive data and function plotting utility. It was originally intended as to allow scientists and students to visualize mathematical functions and data.

Free Open Source Mac OS X Windows Linux

python(x,y)

python(x,y) is a free scientific and engineering development software for numerical computations, data analysis and data visualization based on python programming language, qt graphical user interfaces and http://alternativein .

Free Open Source Windows

Matplotlib

matplotlib is a python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms.

Free Open Source Mac OS X Windows Linux Web

Plotly

Plotly is the easiest way to graph and share data online. Open-source libraries for JavaScript (comparison with HighCharts at https://plot.ly/highcharts-alternative/ ), Python, R, and MATLAB. $19 per month to host private charts and data.

Open Source Freemium Mac OS X Windows Linux iPhone Chrome OS Web

Graph

Graph is an open source application used to draw mathematical graphs in a coordinate system. Anyone who wants to draw graphs of functions will find this program useful.

Free Open Source Windows