The Girvan Newman Clustering plugin for Gephi. This plugin finds clusters in graph, which can be used in Social Network Analysis.
The Girvan–Newman algorithm detects communities by progressively removing edges from the original network. The connected components of the remaining network are the comunnities. Instead of trying to construct a measure that tells us which edges are the most central to communities, the Girvan–Newman algorithm focuses on edges that are most likely “between” communities.