Backlight
BACKLIGHT is a photorealistic relativistic visualisation system. Developed at the Australian National University by undergraduate student Antony Searle , it produces images and videos demonstrating the optical effects of special relativity. http://www.anu.edu.au/Physics/Searle/
Numerical Relativity Exhibitions
What if you take a supercomputer and put it to work on Einstein's theory of relativity? You'll get an incredible series of images representing black holes, gravity and Einstein's equations. This is what happens at the "Numerical Relativity Exhibition", a site from the National Center for Supercomputing Application. Take a peek at this trip into the heart of the universe. http://jean-luc.ncsa.uiuc.edu/Exhibits/