World Fact Book
Recently I came across The World Fact Book, this is a US Government’s CIA website that provides comprehensive information of all countries – their geography, history, economy, people, culture, concerns and more. Unlike the popular belief, seeing this site you will get convinced that US Government is well informed about rest of the world!.
Two sites I normally turn to for Encyclopedic content – the first is MSN’s Encarta and the other is free Wikipedia. Wikipedia even has a Tamil Encyclopedia (if you notice even this URL has a Tamil folder name!)