DataSource.ai - Community-funded data science tournaments
Kaggle - Kaggle offers innovative business results and solutions to companies.
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.
International Data Analysis Olympiad (IDAHO) - International Data Analysis Olympiad (IDAHO) is the world’s leading ML and AI-based data science competition and contest platform that is open to students and professionals of all ages and nationalities.
Colaboratory - Free Jupyter notebook environment in the cloud.
Numerai - Hedge fund that crowdsources market trading from AI programmers over the Internet