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.