PhotoDemon is a free, portable photo editor, with stable and nightly downloads and source code available on GitHub.
Free
6 alternativesQuarkdown
Use Quarkdown, an open-source Markdown typesetting system, to create papers, presentations, knowledge bases, and static websites.
About Quarkdown
Quarkdown is an open-source Markdown-based typesetting system for creating papers, presentations, knowledge bases and static websites. It is a Markdown superset, so standard Markdown syntax works, with opt-in extensions for document setup and advanced control.
It provides paged, plain, docs and slides document types and can output to HTML, PDF, Markdown and plain text. The source recommends LaTeX for widespread collaboration and state-of-the-art typesetting, and Typst for a larger ecosystem and tagged PDFs.
Key features
- Markdown superset where standard syntax works with opt-in extensions
- Paged, plain, docs and slides document types
- Outputs to HTML, PDF, Markdown and plain text
- Live preview shows results as you type
- Scripting with reusable functions to avoid repetition
- Built-in skills for AI agents to work with documents
Best for: People familiar with Markdown who write papers, slides, wikis, or static websites.
Good for
- Standard Markdown syntax works out of the box
- Covers paged documents, plain notes, docs sites and slides in one system
- Docs output includes SEO, agent readiness and accessibility support out of the box
Watch out for
- Source points to LaTeX for widespread collaboration and state-of-the-art typesetting
- Source points to Typst for a larger ecosystem and tagged PDFs
Quarkdown at a glance
- Website
- quarkdown.com
- Category
- Design & Creative › Image Creation & Editing
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Quarkdown FAQ
I already know Markdown. How hard is it to learn Quarkdown?
Standard Markdown syntax works out of the box, and extensions are opt-in for setup and advanced control.
What output formats are supported?
HTML, PDF, Markdown, and plain text via the --renderer (-r) option.
Are docs and wikis ready for production?
Yes, the docs type is described as comparable to Astro Starlight, Docusaurus, or MkDocs, with SEO, agent readiness and accessibility supported out of the box.
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