We have few users license for tecplot, an interactive plotting program for visualization and analysis of data. Documentation is located in /ima/opt/Tecplot/doc, in the form of PDF files readable in acroread. Also, at http://www.msi.umn.edu/software/tecplot/tutorial/, MSI has placed a useful tutorial for their users.
Another package for the scientific visualization installed on our SGIs is AVS 5.3. Documentation on AVS is available from the system administrators, or in /usr/avs online.
Also, we have the IDL for our Linux Workstation. See idlhelp for the help and idldemo for the demo.
NCAR Graphics is a collection of libraries to support scientific visualization, installed on our SGIs and the Linux Workstations. For an introduction, check out man ncargintro.
gnuplot is an interactive plotting program installed on all workstations. It can be run with commands from the keyboard or from a script file, and graphs can be displayed to an X client.
Geomview is an interactive geometry viewer written at the Geometry Center. It displays the objects in the files given on the command line and allows the user to view and manipulate them interactively. For more information, check man geomview.