What's your top sources for machine learning datasets?

Question

I know Kaggle is the most popular one. Any other you're aware of?

Clara Roux · Accepted Answer

The Open Data Portal, which is run by numerous governments and organisations, frequently contains excellent machine learning datasets.
 It is an excellent source of real-world data for testing and training machine learning models.

Valentine Osnovyanenko · Answer

Also, when does it make sense to buy a pre-made labeled dataset?

Answer

Google's Dataset Search is one of the better resources I've found for machine learning datasets.
 It finds publicly available datasets on the internet, making it easy for me to locate what I need for my projects.

Answer

GitHub is where I get my machine learning datasets.

It's always fascinating to find fresh datasets in the many repositories where people contribute intriguing datasets they've gathered or curated.

Answer

The UCI Machine Learning Repository is my first choice when looking for machine learning datasets. 
Their datasets are very accessible and easy to obtain, spanning a wide range of fields.

What's your top sources for machine learning datasets?

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