Visualization of graph data is incredibly challenging, particularly when it comes to extremely large, scale-free graphs and social networks. A few simple searches on the Web and you will find some mesmerizing and very cool images. Perhaps the most cited...
CFinder offers a fast and efficient method for clustering data represented by large graphs, such as genetic or social networks and microarray data. CFinder is a free software for finding overlapping dense groups of nodes in networks, based on the Clique Percolation Method, CPM, of Palla et. al. Nature (2005).
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A. Lancichinetti, and S. Fortunato. (2009)cite arxiv:0908.1062Comment: 12 pages, 8 figures. The software to compute the values of our general normalized mutual information will be soon available at http://santo.fortunato.googlepages.com/inthepress2.