Gapminder World is a online application which allows you to creates interactive maps and charts using data from the World Bank’s World Development Indicators report. For example, you could plot life expectancy against GNP/capita, and watch the relationship change over time. Fascinating stuff and very user-friendly.

Supercourse is a global repository of lectures on public health and prevention targeting educators across the world. Supercourse has a network of over 42500 scientists in 174 countries who are sharing for free a library of over 3232 lectures in 26 languages.