Kaggle - Kaggle offers innovative business results and solutions to companies.
Crowd AnalytiX - Crowd AnalytiX is a data science community and a perfect solution for businesses that want to take advantage of AI but don’t have the in-house expertise or resources.
Colaboratory - Free Jupyter notebook environment in the cloud.
DataSource.ai - Community-funded data science tournaments
DataHack & DSAT - DataHack & DSAT is a Data hacking competition platform made for Data Scientists that harnesses the potential of experts and solves real-world problems.
Infosec Skills - Infosec Skills is technical expertise and engineering development knowledge-building platform where engineers and technical experts can come together to share and learn about the latest security development techniques and strategies.