Movies Recommendation:
MovieLens - Movie Recommendation Data Sets http://www.grouplens.org/node/73
Yahoo! - Movie,Music,and Images Ratings Data Sets http://webscope.sandbox.yahoo.com/catalog.php?datatype=r
Jester - Movie Ratings Data Sets (Collaborative Filtering Dataset) http://www.ieor.berkeley.edu/~goldberg/jester-data/
Cornell University - Movie-review data for use in sentiment-analysis experiments http://www.cs.cornell.edu/people/pabo/movie-review-data/
Music Recommendation:
Last.fm - Music Recommendation Data Sets http://www.dtic.upf.edu/~ocelma/MusicRecommendationDataset/index.html
Yahoo! - Movie,and Images Ratings Data Sets http://webscope.sandbox.yahoo.com/catalog.php?datatype=r
Audioscrobbler - Music Recommendation Data Sets http://www-etud.iro.umontreal.ca/~bergstrj/audioscrobbler_data.html
Amazon - Audio CD recommendations http://131.193.40.52/data/
Books Recommendation:
Food Recommendation:
Merchandise Recommendation:
Healthcare Recommendation:
Nursing Home - Provider Ratings Data Set http://data.medicare.gov/dataset/Nursing-Home-Compare-Provider-Ratings/mufm-vy8d
Hospital Ratings - Survey of Patients Hospital Experiences http://data.medicare.gov/dataset/Survey-of-Patients-Hospital-Experiences-HCAHPS-/rj76-22dk
Dating Recommendation:
Scholarly Paper Recommendation:
Information Network
DBLP http://www.informatik.uni-trier.de/~ley/db/
proximity DBLP http://kdl.cs.umass.edu/data/dblp/dblp-info.html
DBLP-Citation-Network http://arnetminer.org/citation
KDD-2011 http://www.cs.uiuc.edu/~hbdeng/data/kdd2011.htm
CiteSeer (hardly) http://csxstatic.ist.psu.edu/about/data
CiteSeer dumped http://martinharrigan.blogspot.com/2008/07/citeseers-dataset.html
Cora (hardly) http://people.cs.umass.edu/~mccallum/data.html
IMDB http://www.imdb.com/interfaces/
Social Network
Stanford large network dataset (contains lots of network dataset): http://snap.stanford.edu/data/
Stanford class resources http://snap.stanford.edu/na09/resources.html
ICWSM twitter dataset: http://twitter.mpi-sws.org/data-icwsm2010.html
EBSN - Event-based social network dataset: http://www.largenetwork.org/ebsn
Other social network dataset: Slashdot,Enron email,Mit mobile,Epinions reviews.
Sentiment and Option Mining
MPQA http://www.cs.pitt.edu/mpqa/index.html
Bing Liu's homepage
Movie Review http://www.cs.cornell.edu/people/pabo/movie-review-data/
Lee's homepage
twitter sentiment: http://www.sananalytics.com/lab/twitter-sentiment/
Recommendation
Machine Learning
Audio Retrieval
Miscellaneous1
A lot graph dataset including several cups,twitter etc http://graphlab.org/downloads/datasets/
Several graph dataset http://law.di.unimi.it/datasets.php
Delicious/Flikr/Last.FM etc http://www.tagora-project.eu/data/
A small dataset about links http://www.cs.umd.edu/projects/linqs/projects/lbc/index.html
A small dataset including citeseerx/imdb http://komarix.org/ac/ds/
Miscellaneous2
Only user-object
Both user-user and user-object
single-type user netwrok
signed user network
Multi-type user network