Emacs Org-mode is also supported on GitHub and can be integrated into some pretty fancy workflows involving inline LaTeX rendered in Emacs. Org-Babel allows for

Emacs Org-mode is also supported on GitHub and can be integrated into some pretty fancy workflows involving inline LaTeX rendered in Emacs. Org-Babel allows for a “notebook”-esque interface with embedded code samples, which show up non-interactively on GitHub.