FOAF-a-matic is a simple Javascript application that allows you to create a FOAF ("Friend-of-A-Friend") description of yourself. You can read more about FOAF in Edd Dumbill's "XML Watch: Finding friends with XML and RDF" article, at the FOAF homepage on R
Semantic Radar is a semantic metadata detector for Firefox...when detected, shows an icon in browser's status bar. Currently it supports SIOC, FOAF and DOAP metadata.
F. Abel, N. Henze, E. Herder, and D. Krause. User Modeling, Adaptation, and Personalization, volume 6075 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2010)
L. Ding, L. Zhou, T. Finin, and A. Joshi. System Sciences, 2005. HICSS '05. Proceedings of the 38th Annual Hawaii International Conference on, (January 2005)
A. Shakya, H. Takeda, V. Wuwongse, and I. Ohmukai. Proceedings of the IADIS International Conference WWW/Internet 2007, 1, page 371-380. Vila Real, Portugal, International Association for Development of the Information Society, IADIS Press, (October 2007)
K. Möller, T. Heath, S. Handschuh, and J. Domingue. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 795--808. Berlin, Heidelberg, Springer Verlag, (November 2007)
C. Yeung, N. Gibbins, and N. Shadbolt. Proceedings of the International Workshop on Emergent Semantics and Ontology Evolution (ESOE2007) at ISWC/ASWC2007, Busan, South Korea, (November 2007)
G. Grimnes, P. Edwards, and A. Preece. Proceedings of the Third International Semantic Web Conference (ISWC-04), page 152-165. Hiroshima, Japan, Springer Verlag, (2004)
I. Ohmukai, M. Hamasaki, and H. Takeda. Proceedings of the Workshop on End User Semantic Web Interaction,
held in conjunction with the International Semantic Web Conference
2005 (ISWC'05), Galeway, Ireland, Springer, (November 2005)
A. Shakya, H. Takeda, I. Ohmukai, and V. Wuwongse. The Semantic Web - ASWC 2006 Workshops Proceedings, page 55-62. Beijing, China, Jilin University Press, (September 2006)