Markdoc is a powerful, flexible, Markdown-based authoring framework. From personal blogs to massive documentation sites, Markdoc is a content authoring system that grows with you.

Small, fast, and modular DOM & Event library for modern browsers.

Editor.js is a block-styled editor for rich media stories. It outputs clean data in JSON instead of heavy HTML-markup. And more important thing is that Editor.js is designed to be API extendable and pluggable.