This is global business knowledge. Here you can find statistics for almost every country in the world, the Market Potential Index (MPI). It including also business directory, the International Business Statistics (DIBS) database and more.
Here you have data from hundreds of sources. You will find maps and charts for all types of statistics. You can search by countries, categories and other criteria.
The United Nations Statistics Division (UNSD) of the Department of Economic and Social Affairs (DESA). Here you have a statistical database and you can search and download various statistical resources of the UN system.
LINK: http://data.un.org
A search engine for finding data and statistics. The search results will be graphs, charts and tables.