Markdown

Markdown is a text markup language created in 2004 by John Gruber and Aaron Swartz.

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Markdown is a lightweight markup language with plain text formatting syntax. It is designed so that it can be converted to HTML and many other formats using a tool by the same name. Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor. Read more on Wikipedia...

Markdown Wikipedia page
Markdown docs
There are at least 1,023 Markdown repos on GitHub
Markdown first developed in https://talk.commonmark.org/
file extensions for Markdown include md, livemd, markdown, mdown, mdwn, mdx, mkd, mkdn, mkdown, ronn, scd and workbook
Markdown compiles to HTML
The Google BigQuery Public Dataset GitHub snapshot shows 8 users using Markdown in 8 repos on GitHub
There are 2,463 members in the Markdown subreddit
CodeMirror package for syntax highlighting Markdown
Monaco package for syntax highlighting Markdown
Pygments supports syntax highlighting for Markdown
GitHub supports syntax highlighting for Markdown
See also: (18 related languages)HTML, Textile, reStructuredText, Perl, Pandoc, MIME, PHP, Python, Ruby, Drupal, MediaWiki, RStudio, R, C, APL, AsciiDoc, Org, Txt2tags

Example from Riju:

Hello, world!

Example from hello-world:

Hello World

Example from Linguist:

Tender
======

Example from Wikipedia:

# Heading

## Sub-heading

### Another deeper heading
 
Paragraphs are separated
by a blank line.

Two spaces at the end of a line leave a  
line break.

Text attributes _italic_, *italic*, __bold__, **bold**, `monospace`.

Horizontal rule:

---

Bullet list:

  * apples
  * oranges
  * pears

Numbered list:

  1. apples
  2. oranges
  3. pears

A [link](http://example.com).

Feature	Supported	Token	Example
Semantic Indentation	✓
Booleans	X
Line Comments	X

Markdown - Text markup language

Language features