Black Past: provides information on African-American history and people of African ancestry.
The Trans-Atlantic Slave Trade Database: A project of Emory University that provides information on 35,000 slaving voyages.
CIA World Factbook: provides information for 267 world entities.
glbtq: an encyclopedia of gay, lesbian, bi-sexual, transgender and queer culture.
National Center for Children in Poverty: Information about child poverty in the United States.
International Encyclopedia of the Social Sciences: Includes numerous entries on topics in social science research and practice.