elpa-gnuplot-mode 1:0.8.1+git20230727.1.4c6b18f-2 (amd64 binary) in ubuntu oracular

 Gnuplot is a major mode for Emacs flavours with the following features:
  - Functions for plotting lines, regions, entire scripts, or entire files
  - Graphical interface to setting command arguments
  - Syntax colorization
  - Completion of common words in Gnuplot
  - Code indentation
  - On-line help using Info for Gnuplot functions and features
  - Interaction with Gnuplot using comint
  - Pull-down menus plus a toolbar
  - Distributed with a quick reference sheet in postscript.