CKEditor - Real-time collaborative future-ready rich text editor
CKFinder - CKFinder is a powerful and easy to use Ajax file manager for web browsers.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Responsive Filemanager - RESPONSIVE FileManager is a free open-source filemanager image manager stand-alone and plugin for TinyMCE 4, CKEditor and CLEditor. It's possible to select files, images and videos from a server folder and upload them from your computer
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
Flmngr - Free PHP File Manager