Wolfram Data Repository
Immediate Computable Access to Curated Contributed Data
UN-adjusted gridded world population density for the years 2000, 2005, 2010, and 2015
Data from all weekly notifiable disease reports for the United States dating back to 1888. Level 1 data have been custom tailored for specific analyses.
2006-2010 data on daytime commuting patterns in the U.S.