For information on countries use the following links:

 World Fact Book  (Use this one first so the source of information is similar when comparing countries)
 Lonely Planet
 Yahooligans
 Infoplease
Cultural Profiles Project
BUBL Link

For information on flags of countries use the following links:

Flags of the World
Infoplease

For maps of countries use the following links:

National Geographic Expeditions/Atlas
University of Texas Library
Infoplease

For more information:
These have lots of links of information of countries, flags, maps, currencies, time, and weather.

http://members.aol.com/bowermanb/101.html

http://home.att.net/~rmmwms/geography.html