Columbia University
Nasa: Sedac: Population, Landscape, and Climate Estimates
[Free Registration/Login Required] A huge resource for researchers without GIS capabilities who need data on population and land area by country across a range of physical characteristics. These include measures such as the number of...
Other
Nation Master: Country Profiles
Profiles of most of the countries in the world today. Each profile is full of facts, statistics, and rankings against other countries in many different categories.