Observable Notebooks - The portfolio and technical blog of Chris Henrick – provider of professional web development, data visualization, GIS, mapping, & cartography services.
Typora - A minimal Markdown reading & writing app.
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.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
BeakerX - Open Source Polyglot Data Science Tool
Moeditor - The all-purpose markdown editor built with Electron.