React Draft Wysiwyg - Out of the box, feature-rich content editing for React
CKEditor - Real-time collaborative future-ready rich text editor
Edtr.io - Intuitive WYSIWYG web editor, open source & fully adaptable.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
MediumEditor - MediumEditor is a simple inline editor toolbar built with JavaScript.