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.
React Native Desktop - Build OS X desktop apps using React Native
Observable Notebooks - The portfolio and technical blog of Chris Henrick – provider of professional web development, data visualization, GIS, mapping, & cartography services.
Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
Calculist - The open-source, web-based thinking tool that facilitates effective thinking for solving problems.
React Native - A framework for building native apps with React