The World Bank offers a large data repository of economic indicators, statistics, and other useful tools for mapmakers working in international development. Users can search for data by country or by topic (Aid Effectiveness, Health, Poverty, etc.). In addition to viewing or downloading data, the site presents a nifty visualization tool displaying data on a world map.
The Africa Map project, currently in beta, is an online map and data viewer created by Harvard University. The map combines data sets of numerous categories from a wide variety of sources, allowing thematic maps to be viewed and explored. The purposes of the project, according to the project web site:
Interact with the best available public data for Africa
See the whole of Africa yet also zoom in to particular places
Accumulate both contemporary and historical data supplied by researchers and make it permanently accessible online
Work collaboratively across disciplines and organizations with spatial information about Africa in an online environment