UN data is international/world data on a variety of subjects such as employment, poverty, population, export/import numbers, growth,..etc. There are 34 databases in total and you can filter by country.
Pew Research is think tank that does research and polling in the areas of public interest such as internet, science and technology trends, global attitudes, religion and public life, and social and demographic trends.
"Search GuideStar for the most complete, up-to-date nonprofit data available." This database has limited filter features with free access. There is an educator application that will provide free premium access for faculty and students teaching on non-profit related topics.