While working on various projects, I have written a lot of code. Here is some code that I distribute freely:

NCSA TerraServer Blaster - a nice interface to the huge terraserver aerial imagery database.

NCSA Pixel Blaster - a distributed movieplayer for tiled display walls.

vtkActorToPF - allows you to compute geometry using vtk and render using Iris Performer.

vtkPipeline.tcl - tcl/tk script that allows you to browse and modify objects in your vtk pipeline.

vtkFitsReader - VTK class that reads 3D FITS datasets.

pf3dWidgets - I made my own Performer 3D widgets for CAVEvis.