PLplot is a cross-platform software package for creating scientific
plots. To help accomplish that task it is organized as a core C
library, language bindings for that library, and device drivers which
control how the plots are presented in non-interactive and interactive
plotting contexts. The PLplot core library can be used to create
standard x-y plots, semi-log plots, log-log plots, contour plots, 3D
surface plots, mesh plots, bar charts and pie charts. Multiple graphs
(of the same or different sizes) may be placed on a single page, and
multiple pages are allowed for those device formats that support them.