People usually look for free big data sets open to Public, here are some of them open data sets

Data.gov  – US Government datasets which has everything from climate to crime.

Healthdata.gov  – 125 years of US healthcare data including claim-level Medicare data, epidemiology and population statistics.

Amazon Web Services public datasets – Contains a avriety of resources like 1000 Genome Project, NASA’s database of satellite imagery , etc

Gapminder – Compilation of data from sources including the World Health Organization and World Bank covering economic, medical and social statistics from around the world.

Google – Trends http://www.google.com/trends/explore
– Public http://www.google.com/publicdata/directory
– Google Finance https://www.google.com/finance – 40 years’ worth of stock market data, updated in real time.
– Google Books Ngrams http://storage.googleapis.com/books/ngrams/books/datasetsv2.html

Freebase http://www.freebase.com/ – Database of structured data about people, places and things, with over 45 million entries.

Cross-disciplinary data repositories, data collections and data search engines:
http://usgovxml.com
http://aws.amazon.com/datasets
http://databib.org
http://datacite.org
http://figshare.com
http://linkeddata.org
http://reddit.com/r/datasets
http://thedatahub.org alias http://ckan.net
http://quandl.com

Social Network Analysis Interactive Dataset Library (Social Network Datasets)

Datasets for Data Mining
http://enigma.io

Single datasets and data repositories
http://archive.ics.uci.edu/ml/
http://crawdad.org/
http://data.uidai.gov.in
http://data.austintexas.gov
http://data.cityofchicago.org
http://data.govloop.com
http://data.gov.uk/
data.gov.in
http://data.medicare.gov
http://data.seattle.gov
http://data.sfgov.org
http://data.sunlightlabs.com
https://datamarket.azure.com/
http://developer.yahoo.com/geo/g…
http://econ.worldbank.org/datasets
http://en.wikipedia.org/wiki/Wik…
http://factfinder.census.gov/ser…
http://ftp.ncbi.nih.gov/
http://gettingpastgo.socrata.com
http://googleresearch.blogspot.c…
http://books.google.com/ngrams/
http://medihal.archives-ouvertes.fr
http://public.resource.org/
http://rechercheisidore.fr
http://snap.stanford.edu/data/in…
http://timetric.com/public-data/
https://wist.echo.nasa.gov/~wist…
http://www2.jpl.nasa.gov/srtm
http://www.archives.gov/research…
http://www.bls.gov/
http://www.crunchbase.com/
http://www.dartmouthatlas.org/

Frontpage

http://www.datakc.org
http://dbpedia.org
http://www.delicious.com/jbaldwi…
http://www.faa.gov/data_research/
http://www.factual.com/
http://research.stlouisfed.org/f…
http://www.freebase.com/
http://www.google.com/publicdata…
http://www.guardian.co.uk/news/d…

Home

http://www.kaggle.com/
http://build.kiva.org/
http://www.nationalarchives.gov….
http://www.nyc.gov/html/datamine…
http://www.ordnancesurvey.co.uk/…
http://www.philwhln.com/how-to-g…
http://www.imdb.com/interfaces
http://imat-relpred.yandex.ru/en…
http://www.dados.gov.pt/pt/catal…
http://knoema.com
http://daten.berlin.de/
http://www.qunb.com
http://databib.org/
http://datacite.org/
http://data.reegle.info/
http://data.wien.gv.at/
http://data.gov.bc.ca
https://pslcdatashop.web.cmu.edu/ (interaction data in learning environments)
umich.eduhttp://www.icpsr.umich.edu/icpsrweb/CPES/ – Collaborative Psychiatric Epidemiology Surveys: (A collection of three national surveys focused on each of the major ethnic groups to study psychiatric illnesses and health services use)
http://www.dati.gov.it
http://dati.trentino.it
http://www.databagg.com/
http://networkrepository.com – Network/ML data repository w/ visual interactive analytics

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