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).
F. Abel, C. Hauff, G. Houben, R. Stronkman, and K. Tao. Proceedings of the 21st International Conference Companion on World Wide Web, page 305--308. New York, NY, USA, ACM, (2012)