I'd like to expand on this question by asking: are there any free APIs that offer economic/demographic/etc data?
e.g.
- population sizes
- industrial production
- natural resources
- etc...
I'd like to be able to augment open geographic data with, effectively, a machine-readable version of The CIA World Factbook, albeit on a much finer level of detail (town-by-town rather than country-by-country).
Do you know of any good sources?