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.
AWS Cloud9 - AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.
Kajero - Interactive JavaScript notebooks - create good-looking, responsive, interactive documents.
replit - Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
Calculist - The open-source, web-based thinking tool that facilitates effective thinking for solving problems.
Koding - A new way for developers to work.