SCEditor is designed to be a lightweight HTML and BBCode WYSIWYG editor.
Wysiwyg BBcode editor based on jQuery
This plugin makes it possible to edit the content of an element simply by double clicking on it. What sets this plugin aside from other similar plugins is that the editable area won’t look like your plain old boring textarea** or input field. Instead, it will look as if you’re editing the actually page
jQuery plugin for HTML WYSIWYG editor.
jQuery widget to build texteditors
An attempt to take the pain out of wysiwyg editing