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.
I. Huvila, and K. Johannesson. Information Science and Social Media : Proceedings of the International Conference Information Science and Social Media ISSOME 2011, August 24-26, Åbo/Turku, Finland, volume 1 of Skrifter utgivna av Informationsvetenskap vid Åbo Akademi, page 99--106. Åbo Akademi, (2011)
I. Huvila, and K. Johannesson. Information Science and Social Media : Proceedings of the International Conference Information Science and Social Media ISSOME 2011, August 24-26, Åbo/Turku, Finland, volume 1 of Skrifter utgivna av Informationsvetenskap vid Åbo Akademi, page 99--106. Åbo Akademi, (2011)