Gramateria

https://www.gramateria.com/

GrapeJS

https://grapesjs.com/

GrapesJS is a multi-purpose, Web Builder Framework. It can be used to create web pages, Newsletters, Native Mobile Applications, Native Desktop Applications (eg. Vuido), PDFs (eg. React PDF), etc.

DanteII

https://michelson.github.io/dante2/

“Just” another medium clone built on top of DraftJs – in React

SlateJs

https://github.com/ianstormtaylor/slate

React Draft WYSIWYG

Just a react editor

https://github.com/jpuri/react-draft-wysiwyg

Froala

A multi framework editor

Warning : not free. Cost minimum 144 dollars and up to 1800 / year.

https://www.froala.com/wysiwyg-editor

Want some more – check this repo.