CIA World Factbook
This well-known reference has wide-ranging summary data on 268 countries and other entities from around the world. While the economic information is of the snapshot variety, it includes a written overview and some 20 current observations of key economic values. There is also extensive information on geographical, demographic, government, communications, transportation, military, and "transnational issues" for each country. Globstar takes many of the series in this data and ranks countries by their values.