Post-processing of HPC data...
I've worked a great deal in the high performance computing arena, in particular, post processing applications for large datasets. I've worked on some of the largest systems in the world (when I worked on them), including ASC White, ASC Q and others during my stint with the ASC VIEWS program at LLNL. I spent most of my time working on distributed rendering and visualization infrastructures and scalable rendering applications. Something that I continue to work on today at CEI.There are a number of OpenSource projects I worked on and you can get sources/binaries for.
An example of all these technologies running together:

Selected Papers
Many of the papers covering these technologies can be found at. As time/space permits, I will try to put some of them on this web site directly, including these papers and talks.
Valerio Pascucci, Randall J. Frank, Global Static Indexing for Real-time Exploration of Very Large Regular Grids, proceedings of Supercomputing 2001 Conference, Denver, CO, Nov 10-16 2001
Daniel R. Schikore, Richard A. Fischer, Randall Frank, Ross Gaunt, John Hobson, Brad Whitlock, High-resolution Multi-projector Display Walls and Applications, IEEE Computer Graphics & Applications, July 2000
R.J. Frank, Telepath: Cluster-based Visualization Services, DOE Computer Graphics Forum 2004, Santa Fe, NM, April 26-29, 2004
R.J. Frank, The Evolution of Distributed Visualization Clusters, Commodity Cluster Symposium, Tysons Corner, VA, July 2003
R.J. Frank, B. Alcorn, Parallel Image Compositing API, Commodity Based Visualization Clusters Workshop, IEEE Visualization 2002, Boston, MA, October 2002
R.J. Frank, Production Cluster Visualization: Experiences and Challenges, IEEE Visualization 2003: Workshop on Parallel Visualization and Graphics, Seattle, WA, October 19-24, 2003
R.J. Frank, Streaming Through My Playstation: Future Directions for Hardware and Software Applications, Engineering Opportunities in the 21st Century Conference, LLNL, March 12-13, 2003
Distributed Multi-headed X11 (DMX)
This project allows one to collect a number of X11 servers running on different machines and using them as a single display. This project is now part of the the X.org server. In fact you can probably find it on most Linux distros these days. The sourceforge project is not really active anymore as the development has moved to the X.org project.
Blockbuster
This project allows for the distributed display of large, multi-scale movies on clusters through the DMX server. It was developed by Tungsten Graphics, but the file format was developed by my team at LLNL.
Chromium
This project allows for parallel rendering of OpenGL applications on clusters of graphics computers. This project won an R&D 100 award a couple of years ago. There is a pretty cool demo of the system in action recorded live here.