Guess: The Graph Exploration System
From the webpage:
GUESS is an exploratory data analysis and visualization tool for graphs and networks. The system contains a domain-specific embedded language called Gython (an extension of Python, or more specifically Jython) which supports the operators and syntactic sugar necessary for working on graph structures in an intuitive manner. An interactive interpreter binds the text that you type in the interpreter to the objects being visualized for more useful integration. GUESS also offers a visualization front end that supports the export of static images and dynamic movies.
Graph movies? Cool!
If you could catch a graph in an unguarded moment, what would you want to capture in a movie?
See also: Sourceforge – Guess.