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)
  • Marple (https://www.marpledata.com/)

• 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)