Observable Notebooks - The portfolio and technical blog of Chris Henrick – provider of professional web development, data visualization, GIS, mapping, & cartography services.

RStudio - RStudio™ is a new integrated development environment (IDE) for R.

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.

Calculist - The open-source, web-based thinking tool that facilitates effective thinking for solving problems.

BeakerX - Open Source Polyglot Data Science Tool

iPython - iPython provides a rich toolkit to help you make the most out of using Python interactively.