react-simplemde-editor by RIP21

Simple no-frills code editor with syntax highlighting. Maintained by react-simple-code-editor on GitHub, where it has earned 1,731 stars from the community.

A small React hook to turn elements into fully renderable & editable content surfaces, like code editors, using contenteditable (and magic). Maintained by FormidableLabs on GitHub, where it has earned 619 stars from the community.

A simple markdown editor with preview, implemented with React.js and TypeScript. Maintained by uiwjs on GitHub, where it has earned 2,925 stars from the community.