Joomla CK Editor is a plugin that will replace Standard TinyMCE editor of Joomla.
It's installed as a Plugin.
If you got to Site Mambots section, you can set extra parameters like what to show and what not.
One of the best options it the upload and insertion of an image into your content. And ist very easy to switch to HTML code and edit it.
It will not clean your HTML code like the basic Joomla Editors do. so you keep the code!
The beste option you can set after installation is to set the standard editor to JoomlaCkEditor in your Global Settings.
Download from Joomla CK Editor