I always use JCE editor

JCE makes creating and editing Joomla!® content easy

Add a set of tools to your Joomla!® environment that give you the power to create the kind of content you want, without limitations, and without needing to know or learn HTML, XHTML, CSS...

JCE is extendable

Install additional plugins to extend JCE's abilities²

• File Manager - Insert links to files of any type with customizable descriptions that include file date, size and icon.
• Media Manager - Upload and insert media files (flash, windows media, quicktime etc), embed Youtube movies² and create popups³ to any media type! The Media Manager also includes a custom built FLV Player!
• Image Manager Extended - Resize, rotate and thumbnail images on upload or after, and create create image popups³ with just a few clicks!²
• Captions - Create captions around images with control over the caption container and text styling²