(registered 2015-10-26, last updated 2015-10-26) 

Identifier: GFM

Name: GitHub Flavored Markdown

Description:
"Original" with the following differences:
   1. Multiple underscores in words
   2. URL (URI) autolinking
   3. Strikethrough
   4. Fenced code blocks
   5. Syntax highlighting
   6. Tables (- for rows; | for columns; : for alignment)
   7. Only some HTML allowed; sanitization is integral
      to the format

References:
<https://help.github.com/articles/github-flavored-markdown/>
<https://github.com/github/markup/tree/master#html-sanitization>

Contact Information:
  (corporate) GitHub, Inc. <https://github.com/contact>