UN Data - Worldwide Country Stats.

http://data.un.org/

Literally a world of information!

This is a free database for all those comparison stats, country profiles, and other questions of the sort from countries around the world.

It searches over 55 million records covering topics such as:
Agriculture
Education
Employment
Energy
Environment
Health
Human development
Industry
Information and Communication Technology
National Accounts
Population
Refugees
Trade
Tourism

A very easy interface to use and search. Try it out!