International Relations resource of the day

In what I hope to be an ongoing project to popularize the world of online international relations resources, I give you the granddaddy of them all:

The CIA World Factbook

Developed as a resource for State Department and CIA, there is an overview of every country in here, along with pertinent economic, political, and geographic data. Not terribly useful as a citation, but great if you want to know about a country I or someone else refers to that you may not know much about.