NotePlan - Make plans inside an individual markdown note for every day in your calendar. Use it as a journal for your daily tasks and plan todos in advance. For Mac, iPhone and iPad.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Markdown to PDF - Super simple way to get your markdown files to PDF
MkDocs - Project documentation with Markdown.
UnMarkDocs - Unleash the Power of Markdown to Write Better Product Documentation
Docusaurus - Easy to maintain open source documentation websites