Ryan Cordell reviews Boostnote, an application for taking notes using the Markdown plain-text syntax and also saving snippets of code in a range of programming languages.

Finally, markdownlint adds proper syntax checking to your notes. The biggest downside I've noticed with using VS Code instead of Obsidian is that you actually need to write in proper Markdown ...

Plain text is the best way to make sure your writing is accessible across a variety of platforms and devices. Markdown is a lightweight formatting syntax that offers formatting and typography ...

As noted above, Marked also supports MultiMarkdown (including math syntax), and screenplay writers may be interested in Screenplay Markdown and using that syntax in Marked.

Markdown and CommonMark are slightly different since technically CommonMark did not fork the Markdown code but the Markdown syntax. This is much murkier legal territory.