CKEditor - Real-time collaborative future-ready rich text editor
Principle - Principle makes it easy to create animated and interactive user interface designs.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Tumult Hype - Tumult Hype is a keyframe-based animation system for creating HTML5 web content.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
CIC enVision - enVision software makes large volumes of digital multimedia content easily and quickly accessible also provides WYSIWYG layout editor.