ThemeForest - Flexy - liquid admin skin - 7 in 1 - FULL | 1,46 MB
Advanced and easy to use administration theme which comes in 7 different colour variations. The theme is liquid, which means the width of the content area adapts to your browsers window size.
The template is divided into a login page and a content page that uses 4 different tabs to display the commonly used interface elements, needed to create an admin panel.
The Icon set used is available for free and contains 96 modern icons, so if you think something is missing chances are high you can add it with these icons ;)
The template also includes .psd files for all skins, in case you want to addapt them.