markItUp! is a very lightweight, customizable and flexible engine made to meet the developer's needs in their CMSes, blogs, forums or websites.
Hallo is a very simple in-place rich text editor for web pages. Instead of cluttered forms or toolbars, you edit your web content as it is. Just you, your web design, and your content.
It uses jQuery UI and the HTML5 contentEditable functionality to edit web content.
jQuery TE - jQuery Text Editor, a HTML editor with WYSIWYG model and in fact this jQuery plugin. jQuery Text Editor is very easy to use and have functional system. In addition, you can customize to the your text editor if you wish.