I'm using Org Mode to fill these pages with life. It's older than Markdown, has only a single flavour and built into Emacs.
| key chord | effect |
|---|---|
C-u C-u C-c . |
insert current timestamp |
C-u C-c C-l |
insert link with file name completion |
=fixed-width= mode by delimiting it with =
signs. To have a literal = in the text without interrupting the
syntax, you have to insert a Zero Width Space as an Escape Character in front of the
literal =C-x 8 <RET> zero width space <RET>