Here is a collection of excellent data sources for economic analysis. You might find discrepancies in the data, but that is usually the case with economic data as the sources might differ. So use caution while using the data and understand what it is trying to say before using it.
1. The World Bank - Excellent source of raw data for several key indicators, including education, climate change, health, development for over 200 countries for the last two decades.
2. Trading Economics - Although the full features of this site requite a subscription, the basic package still is a storehouse of information. As the website suggests, the information is more focused on economic, financial and trade data.
3. International Monetary Fund - Again a great global resource for several key development and urbanization indicators for almost all sovereign nations with a particular emphasis on Europe and developing countries.
4. UNDP - Really good data, and user defined tables on human development related statistics.
4. UNDP - Really good data, and user defined tables on human development related statistics.
To be updated with more resources as I come across them.