Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.

Daily Coding Problem - Get exceptionally good at coding interviews

Kajero - Interactive JavaScript notebooks - create good-looking, responsive, interactive documents.

HackerEarth - HackerEarth is the network of top developers across the world. They connect to start-ups, tech companies, organizations and discover the best developer jobs. They participate in programming challenges and compete against other top developers.

BeakerX - Open Source Polyglot Data Science Tool

TalScale - get the right candidates on open positions faster on TalScale…