Gapminder World is not just an aggregation of data from various organizations. It’s also a brilliant (although simple) visualization tool for parameters such as per capita income, disease and life expectancy, unemployment, labor force participation among others across countries. It combines data from many sources including OECD, World Bank and FAO.
If you’re taking a course in Economics for the very first time, or you just want to understand how inflation, deflation and the money market in general works, this is a very good introductory video for you to understand the basic concepts. It helped me, and hopefully it can also help you.