aiSee automatically calculates a customizable layout of graphs specified in GDL (Graph Description Language). This layout is then displayed, and can be interactively explored, printed, and exported to various formats.
This dissertations presents an algorithm on the webgraph for finding dense bipartite graphs wich represents web-communities.
By performing further steps of the algorithm several levels of communities are recognized which can be related to communites of former levels.
C. Tantipathananandh, T. Berger-Wolf, und D. Kempe. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 717--726. New York, NY, USA, ACM, (2007)