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 experimentshttp://www.cs.cornell.edu/people/pabo/movie-review-data/

Music Recommendation:

• Last.fm - Music Recommendation Data Setshttp://www.dtic.upf.edu/~ocelma/MusicRecommendationDataset/index.html
• Yahoo! - Movie, Music, 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:

• Institut für Informatik, Universit?t Freiburg - Book Ratings Data Sets http://www.informatik.uni-freiburg.de/~cziegler/BX/

Food Recommendation:

• Chicago Entree - Food Ratings Data Setshttp://archive.ics.uci.edu/ml/datasets/Entree+Chicago+Recommendation+Data

Merchandise Recommendation:

• Amazon - Product Recommendation Data Sets http://131.193.40.52/data/

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:

• www.libimseti.cz - Dating website recommendation (collaborative filtering)http://www.occamslab.com/petricek/data/

Scholarly Paper Recommendation:

• National University of Singapore - Scholarly Paper Recommendationhttp://www.comp.nus.edu.sg/~sugiyama/SchPaperRecData.html