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DataSource.ai - Community-funded data science tournaments

Colaboratory - Free Jupyter notebook environment in the cloud.

Machine Hack - Machine Hack is the Machine Learning competition and assessment platform that makes it easy for data scientists, engineers, and business professionals to learn, compete, and get hired.

Driven Data - DrivenData hosts data science competitions to build a better world, bringing cutting-edge predictive models to organizations tackling the world's toughest problems.

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