markItUp! is a JavaScript plugin built on the jQuery library. It allows you to turn any textarea into a markup editor. Html, Textile, Wiki Syntax, Markdown, BBcode or even your own Markup system can be easily implemented.
markItUp! is a very lightweight, customizable and flexible engine made to meet the developer's needs in their CMSes, blogs, forums or websites.
Redactor is a free javascript program for writing texts on the web. Redactor using the jQuery library. Support for all major browsers.
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.