World maps and animations by topic
"Worldmapper is a collection of world maps and animations, where territories are re-sized according to the subject of interest. There are now nearly 700 maps. Maps 1-366 are also available as PDF posters. When you choose a map to view, there are links at the bottom to download a data file giving the values used for all 200 territories, a graph (usually a cumulative frequency one) of the data, and a top 10 or 20 table (and the original data used, and its source)."