Moeditor - The all-purpose markdown editor built with Electron.
Observable Notebooks - The portfolio and technical blog of Chris Henrick – provider of professional web development, data visualization, GIS, mapping, & cartography services.
Caret - Better Markdown Editor for Mac / Windows / Linux
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.
Write.md - Sharable, distraction free markdown editor.
BeakerX - Open Source Polyglot Data Science Tool