CKEditor - Real-time collaborative future-ready rich text editor
Aloha Editor - Aloha Editor is an HTML5 WYSIWYG Editor that gives you a total new experience when editing.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Trumbowyg - Feature-packed WYSIWYG editor in only 15kB of JavaScript
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
SCEditor - A lightweight WYSIWYG BBCode & HTML editor