Markup Systems
Scribble
Scribble is a collection of tools for creating prose documents—papers, books, library documentation, etc.—in HTML or PDF (via Latex) form. More generally, Scribble helps you write programs that are rich in textual content, whether the content is prose to be typeset or any other form of text to be generated programmatically.
It is a markup language integrated or at least adjacent to Racket, a lisp dialect.
Nota
Nota is a language for writing documents, like academic papers and blog posts. The goal of Nota is to bring documents into the 21st century.
Bene
Bene is a reading system for documents written in the EPUB file format.
Typst
a new open-source typesetting software that aims to effectively replace LaTeX in its niche and also bring a modern, free tool to a broader set of use cases.