Public Data Sources for Machine Learning

UCI	Collection of benchmark datasets for regression and classification tasks	UCI Machine Learning Repository
KDD	Extended version of UCI datasets	UCI KDD Extended Version
DELVE	Platform for comparative assessment of regression and classification tasks	DELVE
DMOZ	Collection of links for different datasets	DMOZ Directory
KDNuggets	collection of links for different datasets	Further Datasets
ChemDB	chemical data that can be used as datasets for machine learning	ChemDB
Golem	trying to learn rules for prediction	Golem Datasets
NDR	Data sets for nonlinear dimensionality reduction	Nonlinear Dimensionality Reduction
General	A list of dataset links by category	further datasets
AWS Public	public list of datasets via S3	large dataset repository
Datahub	public list of datasets	datahub datasets
BigML	curated list of datasets	bigML datasets
Curated Github	curated categorized list of datasets on github	public datasets on github
wikipedia list	curated categorized list of datasets on wikipedia	datasets of ML
Data Science	Data Science Projects	19 free public data sources
Data Science	Data Science Projects	data science datasets