Here is a list of related projects to get new ideas and compare features
PLOTTING AND DATA ANALYSIS
* Free
* Veusz (https://veusz.github.io/)
* QCustomPlot (http://qcustomplot.com/)
* Kst (https://kst-plot.kde.org/)
* SciDAVis (http://scidavis.sourceforge.net/)
* matplotlib (http://matplotlib.org/)
* Grace (http://plasma-gate.weizmann.ac.il/Grace/)
* gnuplot (http://www.gnuplot.info/)
* Plotly (https://plot.ly/)
* Jupyter (http://jupyter.org/)
* Plot2 (http://apps.micw.org/apps/plot2/index.php)
* Abscissa (http://rbruehl.macbay.de/)
* Alphaplot (http://alphaplot.sourceforge.net/)
* GR Framework (http://gr-framework.org/)
* PyQtGraph (http://www.pyqtgraph.org/)
* PlotJuggler (https://facontidavide.github.io/PlotJuggler/)
* dataprep (https://github.com/sfu-db/dataprep, https://dataprep.ai/)
* autoplot (http://autoplot.org/)
* JKQTPlotter (https://jkriege2.github.io/JKQtPlotter/index.html)
* Simfit (http://www.simfit.org.uk)
* Lmfit (https://lmfit.github.io/lmfit-py/)
* uPlot (https://github.com/leeoniya/uPlot)
* Makhber (https://github.com/Makhber/makhber)
* Non-free
* Origin (http://www.originlab.com/)
* Sigmaplot (https://systatsoftware.com/products/sigmaplot/)
* IgorPro (https://www.wavemetrics.com/products/igorpro/igorpro.htm)
* FlexPro (https://www.weisang.com/en/flexpro/at-a-glance/)
* qtiplot (http://www.qtiplot.com/)
* MagicPlot (http://magicplot.com/)
* Teraplot (http://www.teraplot.com/)
* imc FAMOS (https://www.imc-tm.de/produkte/messtechnik-software/imc-famos/)
* Highcharts (https://www.highcharts.com/demo)
* DataGraph (https://www.visualdatatools.com/DataGraph/)
* UniPlot (https://www.uniplot.de/index.html)
* Discontinued
* DatPlot (http://www.datplot.com/)
* Scigraphica (http://scigraphica.sourceforge.net/)
* Hippodraw (http://www.slac.stanford.edu/grp/ek/hippodraw/)
STATISTICAL PACKAGES
* gretl (http://gretl.sourceforge.net/)
* JASP (https://jasp-stats.org/)
* MacAnova (http://www.stat.umn.edu/macanova/)
* Pandas (https://pandas.pydata.org/)
* PSPP (https://www.gnu.org/software/pspp/)
* R/R-Studio/rkward (https://www.r-project.org/, https://www.rstudio.com/, https://rkward.kde.org/)
* ROOT (https://root.cern.ch/)
* SOFA (http://www.sofastatistics.com/home.php)
* STATA (https://www.stata.com/)
* SciPy, NumPy
* MATLAB/Octave/Scilab/FreeMat
TOOLS
* WebPlotDigitizer (https://github.com/ankitrohatgi/WebPlotDigitizer)