American Philosophical Association www.apaonline.org: has information for research web-sites and journals, national and local conferences by topic of interest -- including under-graduate essay publication/presentation opportunities, and potential for scholarships. 

Stanford Encyclopedia of Philosophy. www.plato.stanford.edu

Routledge Encyclopedia of Philosophy Online www.rep.routledge.com

Amnesty International has information on human rights

PETA is an excellent source of information on animal rights