EDIT: It does not look like this plugin is still available
One of the things I really like about this plugin in relation to the other plugins that do something similar is that there is no extra page within the admin menu hierarchy. It works right on the main Posts/Pages pages.
It’s a premium plugin and you can find it over at CodeCanyon. Thanks to Rémi Corson, who also works over at WooThemes 🙂
WordPress Educator Zac Gordon 