The following resources are regularly updated official websites of large commercial, government and public organizations. This list is limited and you may find more resources through the Africana Library page.
The largest electronic distributor of African news and information worldwide.
Regularly updated country profiles include flags, georgraphy, people, government, economy, communications, transportation, and more.
An encyclopedic reference work cataloging all of the world's 6,912 known living languages. You can link directly to the Ethnologue's list of the Languages of Africa.
Global Exploration for Educators Organization
Travel the world, earn professional development credit, and bring global understanding into your classroom!
Library of Congress' Description and analysis of the historical setting and the social, economic, political and national security systems and institutions of countries throughout the world.
Travel guides, information and advice. You can start with their section on Africa.
Satellite, street maps and more in their online atlas.
The official website of the UN contains current event briefing, documents, maps, publications, databases, and more.
General and travel information on various regions in the world (including, of course Africa); also links to foreign contacts (foreign Embassy personnel in the US and Embassies and Consular offices). You can also link directly to the State Department's Bureau of African Affairs.
Travel information includes country specific information, travel alerts/warnings, and more.
The biggest multilingual free-content encyclopedia on the Internet. Since this is a community-built reference and a tertiary source (like all encyclopedias, one with no original research) it is not considered an appropriate citation for a professional publication. Therefore Wikipedia articles should primarily be used for background information and as a starting point for further research.
A lot of information including all sorts of maps; also a large list of country flags.