Statistics
Wolfram Alpha
http://www.wolframalpha.com
This is a computational knowledge engine that answers
all things statistical and mathematical in such varied
subjects as chemistry, transportation, culture, finance, weather and sports.
U.S.Census Bureau
http://www.census.gov
Bureau of Economic Analysis
http://www.bea.gov
EIA-Official Energy Statistics from the U.S. Government
http://www.eia.doe.gov/
A website from the Energy Information Administration site provides current and historical statistics on energy production, demand, trade, and prices.
FedStats: Federal Statistics Gateway
http://www.fedstats.gov/
Statistics from over 100 federal agencies.
Historical United States Census Data Browser
http://mapserver.lib.virginia.edu/
The data and terminology presented in the Historical Census Browser are drawn directly from historical volumes of the U.S. Census of Population and Housing.
London Datastore
http://data.london.gov.uk
Greater London Authority data available free to the public.
MISER: Massachusetts Institute for Social and Economic Research
http://www.umass.edu/miser/
Massachusetts-specific statistics.
Population Reference Bureau
http://www.prb.org/
Worldwide demographics.
2010 Statistical Abstract
http://www.census.gov/compendia/statab/
The Statistical Abstract of the United States, published since 1878, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States.

