Roadmap

Here are a list of features I wish to have, more or less classified by order of importance:

Main features

Support for some simple format (maybe TOML?) configuration files to list chapters and metadatas, so ideally you just run crowbook some_file and you don't have to pass more options, it generates the rest. (Status: thinking about how to do it).
Support for basic Markdown features useful in writing novels (Status: more or less done, thanks to pulldown-cmark)
Support for Epub format as output. (Status: HTML underway, but more work needed to generate tocs and stuff)
Support for LaTeX format as output. (Status: shouldn't be that difficult, at least for basic stuff).
Support for good french typography including in HTML format, and by that I mostly mean non-breaking spaces. (Status: basic is there.)
"Good" default templates and CSS. And by "good" I mean, well, for me. (Status: shouldn't be that hard, mostly copy/pasting what I already have)
Some configuration if other people want to use it too. (Status: thinking about how to do it).

Support for HTML as output format.
Support for ODT as output format.
Support for easily embedding custom fonts in Epub/HTML
Correct support for technical books
Maybe some kind of GUI because not everyone is a geek (though non-geeks might not write books in markdown)