databases of statistical information
This United Nations web page has databases with different kinds of demographic information for countries around the world.
Online databases of national and international statistics.
Generate charts comparing demographic data in different countries, downloadable as text files.
World Economic Forum
The World Economic Forum does reports on a wide range of global issues.
Government data from countries around the world compiled on The Guardian's website. Much of the data is available for download as Google Docs spreadsheets, and there's also an API for accessing the datasets.