Third World Countries: Lists by income, poverty, human rights, and other measures.
Countries of the world:
Learn basic background information about all the countries of the world. This is the CIA's World Factbook
Human Rights Watch:
Human Rights Watch researchers conduct fact-finding investigations into human rights abuses in all regions of the world.
Library of Congress: Country Studies
Library of Congress offers this series of online books which provide extensive information on all aspects of the country, its society, natural resources, econony, history, and international relationships.