You Need A Wiki - Create a wiki with Google Docs
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.
Docsify.js - A magical documentation site generator.
Caret - Better Markdown Editor for Mac / Windows / Linux
markdown to web - Convert markdown to online web page
Liveblocks - Build amazing real‑time collaborative products