gri-html-doc 2.12.27-1.1 (riscv64 binary) in ubuntu noble

 Gri is a command-driven application for making x-y graphs,
 contour-graphs, and image graphs.
 .
 This is the Gri manual in HTML format and can be accessed directly via
   file:/usr/share/doc/gri/html/index.html
 or
   http://localhost/doc/gri/html/
 or via doc-central, dwww or dhelp interfaces (if you have the doc-base
 package installed). Note that the manual in info format (without graphics)
 is included in the gri package itself. This manual is available on
 the web via:
   http://gri.sourceforge.net/gridoc/html/