Freeware graphical library in DXF (Drawing Interchange Format) format for Fortran 90 programmers.

Fortran interface for OpenGL, an environment for developing portable, interactive 2D and 3D graphics applications, and GLUT.

An API for gnuplot for Fortran 95. It uses kernel IPC, and uses fortranposix. [Open source, LGPL]

A set of Fortran numerical and graphical libraries empowering users with run-time animation, contour plots, surface plots for gaining insights into your computation. [Shareware, 30 days trial]

Fortran and C based software package for scientific visualization.

Fortran and C-callable, device-independent graphics package for making simple scientific graphs.

Graphical library of more than fifty subroutines that produce publication-quality drawings to printers, display adapters and as Postscript, CGM, and AutoCAD DXF files. Source code available.

Callable from Fortran and C programs on Linux and Mac OS X. Binaries and source code are available for purchase. Also includes conversion and utility programs.