CKEditor.com

CKEditor is a ready-for-use HTML text editor designed to simplify web content creation. It's a WYSIWYG editor that brings common word processor features directly to your web pages. Enhance your website experience with our community maintained editor.

Trumbowyg

Trumbowyg a lightweight WYSIWYG editor Trumbony is a light, translatable and customisable jQuery plugin. Beautiful design, generates semantic code, comes with a powerful API.