TagCloud is an automated Folksonomy tool. Essentially, TagCloud searches any number of RSS feeds you specify, extracts keywords from the content and lists them according to prevalence within the RSS feeds.
R. Kanawati, and M. Malek. AAMAS '02: Proceedings of the first international joint conference on Autonomous agents and multiagent systems, page 1137--1138. New York, NY, USA, ACM Press, (2002)
B. Krause, R. Jäschke, A. Hotho, and G. Stumme. HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia, page 157-166. New York, NY, USA, ACM, (2008)
C. Cattuto, D. Benz, A. Hotho, and G. Stumme. International Semantic Web Conference, volume 5318 of Lecture Notes in Computer Science, page 615-631. Springer, (2008)
D. Benz, K. Tso, and L. Schmidt-Thieme. Proceedings of the Second Workshop on Innovations in Web Infrastructure (IWI 2006), Edinburgh, Scotland, (2006)
M. Blank, T. Bopp, T. Hampel, and J. Schulte. Good Tags - Bad Tags. Social Tagging in der Wissensorganisation, page 85-97. Münster, New York, München, Berlin, Waxmann, (2008)
N. Saeed, and Y. Yang. ACE '08: Proceedings of the tenth conference on Australasian computing education, page 113--118. Darlinghurst, Australia, Australia, Australian Computer Society, Inc., (2008)