Are there any useful datasets available on the Internet for data mining?

Question

Does anyone know of any good resource where you can download sample (real) data for experiments with statistics and machine learning methods, such as decision trees, etc.?

I am currently studying machine learning methods, and it would be very useful for me to have real data to evaluate the accuracy of various tools.

If anyone knows any good resource (maybe like csv, xls files or any other format), I would be very grateful for the suggestion.

Answer 1

UCI Machine Learning Archive KDD, , . UCR Time Series Classification/Clustering Page.

Answer 2

DataWrangling.com, .

Answer 3

Kaggle .

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Answer 4

, Vellum Information, , :

http://velluminformation.com/2014/03/05/big-data-public-databases-an-annotated-bibliography/.

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http://velluminformation.com/2012/05/19/free-online-public-data-sources-an-annotated-bibliography/.

The obvious disclosure is my blog, so there are other technical things.