CIA World Factbook Up-to-date encyclopedic-type information (government, people, disputes, military, etc.) on many countries, gathered and produced by the CIA. Includes maps and flags among other features.
U.S. State Department Country Data Sheets The U.S. State Department offers fact sheets about every country, particularly related to the diplomatic status of those countries. You can also find State Department advice about traveling in particular countries.
World by Map World by Map presents several statistics and charts by tables, maps and diagrams, (country focus).