African Art Museum
Features a collection of African tribal art from 100 ethnic groups. Items on display include wooden and bronze statues, masks, religious, ritual and domestic objects, furniture, and weapons.
Wikipedia: African art
African art is any form of art or material culture that originates from the continent of Africa. This article discusses primarily visual African art.
University of Pennsylvania: African Sculpture
Contains cultural information and over 20 images of tribal artwork from Nigeria, Liberia, Zaire, Botswana, Ivory Coast, and Gabon.
Artchive: African Art
Summarizes the great diversity of art from the African continent and showcases masks and figures from a variety of tribes.
ArtLex: African Art
Features hyperlinked examples of a variety of art from Africa.