We have a wide variety of software for working with OpenGGCM data. Development is done with subversion, which is in some cases exposed to the outside (non-UNH) world, e.g.
svn checkout svn://artemis.sr.unh.edu:80/openggcm-utilities
There are many programs for OpenGGCM post-processing.
After you have installed VisIt, you can start it up with the OpenGGCM plugin. visit -default_format GGCM
Media:mak-vrml-07.txt script to generate VRML files
Media:00material.txt material definition file for the above script
OpenGGCM vs DMSP How to create data and make plot to compare OpenGGCM with DMSP