Observable - Interactive code examples/posts
React Native Desktop - Build OS X desktop apps using React Native
nbviewer.org - Rackspace server host Jupyter Notebooks from your github repo
Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
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.
CodeOnline - A remote and secure workspace powered by VSCode