Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Sketch - Professional digital design for Mac.
LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.
Affinity Designer - Professional creative software, exclusively for Mac.
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...