Flmngr - Free PHP File Manager
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.
Tiny File Manager - Web based File Manager in PHP, Manage your files efficiently and easily with Tiny File Manager
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.