SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.

GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.

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.

LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming

Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...