Quarkdown is an open-source Markdown-based typesetting system designed for creating books, PDFs, slides, documentation, knowledge bases, and presentations from a single source.

Unlike traditional Markdown tools, Quarkdown adds scripting, functions, variables, layouts, and advanced document features while keeping a relatively clean Markdown syntax.

GitHub: https://github.com/iamgio/quarkdown

More details: https://digitalescapetools.com/tools/tool.html?id=quarkdown

More privacy-friendly tools: https://digitalescapetools.com/