The Simple CMS plugin converts your WordPress admin panel into a simple CMS. This is aimed at web designers who want to provide a simple adminstration
After you've downloaded and extracted the files:
Visit the Simple CMS page for more information.
Note: This plugin intentionally does not affect the admin panel if you are a "WordPress Administrator". This ensures that you as the owner/designer of the site have full control over the admin panel, yet anyone at a lower userlevel (ie: "WordPress Editor") will see a massively simplified panel. You can alter user levels via the "Users" option in the regular WordPress admin panel.