Find out all the facts about almost any country in the world
http://www.cia.gov/cia/publications/factbook/

Check world time and dialling codes
http://www.whitepages.com.au/wp/search/time.jhtml

Quick currency conversion
http://www.oanda.com/convert/classic?user=precision&lang=en

Smartraveller.gov.au - advice about world travel
http://www.dfat.gov.au/travel/

A guide to writing systems
http://www.omniglot.com

Multiple dictionary search engine
http://www.yourdictionary.com/diction1.html