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.
Edtr.io - Intuitive WYSIWYG web editor, open source & fully adaptable.
ContentTools - A small & beautiful WYSIWYG editor for HTML content.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
Adobe Contribute - The all-new update to Adobe Captivate (2019 release) offers ease to beginners and speed to professionals for creating all kinds of mobile-ready courses in minutes