CKEditor - Real-time collaborative future-ready rich text editor
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
HTML Editor - Create HTML snippets with a simple WYSIWYG editor
Froala Editor V2 - A beautiful modern WYSIWYG HTML text editor
CoffeeCup HTML Editor - The CoffeeCup Free HTML Editor is a drag-and-drop HTML Editor with built-in FTP uploading.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.