Once upon a time, I quite enjoyed writing in Perl's POD format. It's not really a "hidden" markup language like Markdown or (partially) org, but it still had wa

Once upon a time, I quite enjoyed writing in Perl's POD format. It's not really a "hidden" markup language like Markdown or (partially) org, but it still had way less overhead than XML or BBCode. =head1 This is a major headline =head2 And a secondary one. Paragraphs end with blank lines, as with many other markup systems. And you can use I<emphasize> B<Text> with inline codes, including some richer than the usual italics/bold, like e.g. for F<filenames.txt>. Doesn't serve the dual purpose of both being a source of translation and being read verbatim without the reader knowing that it's a markup language, but honestly, you get used to stuff like that easily. Rebol's MakeDoc also was quite neat, and had a very minimal implementation. Man, so much lost potential with that language.