F.EN.I.A. is a Fortran 95 library providing rich graphical output of 2D and 3D scientific data in the SVG and VTK (.vtp) formats. The output can be viewed with cross-platform, open-source viewers like Inkscape, Firefox and Paraview.
This library is a Fortran 95 gnuplot interface for some Unix like OS'es. This provides some routines that enables direct access of a child gnuplot session from a Fortran 95 program. You will need a copy of fortranposix to make this work.