Quarkdown is a Markdown-based typesetting system for creating papers, presentations, knowledge bases, and static websites. It is presented as an open-source tool that combines writing in Markdown with additional document structure, layout, and publishing features.
The product is designed for a command-line workflow: create a project, edit a `.qd` file, compile it, and optionally preview changes live or export to PDF. The source material shows Quarkdown as a single tool for multiple document formats, including continuous notes, paged documents, slides, and docs-style sites.