"Eigenfactor.org is a non-commercial academic research project sponsored by the Bergstrom lab in the Department of Biology at the University of Washington. Eigenfactor ranks journals much as Google ranks websites. Scholarly references join journals together in a vast network of citations. Eigenfactor uses the structure of the entire network (instead of purely local citation information) to evaluate the importance of each journal."
"In a cooperation between Eigenfactor and the immensely talented Moritz Stefaner, a set of 4 interactive visualizations based on the Eigenfactor Metrics and hierarchical clustering were produced in order to explore emerging patterns in citation networks."
Calculated with Cytoscape, built with Flare.

www.cytoscape.org
www.flare.prefuse.org
http://well-formed.eigenfactor.org
www.well-formed-data.net

found via www.visualcomplexity.com