brightonmike

Coffee Admin Theme gives the dashboard a bolder look with sumptous dark tones and a textured background. The theme is fully compatible with the latest version of WordPress supporting the new fly-out menus. Because of this, the theme will not work as intended in older versions.
The plugin has options to switch between different themes, and I will be adding more themes over time.
You also get a great selection of Google Web Fonts to choose, further enhancing your dashboard experience.

Coffee Admin Theme

Coffee Admin Theme is a WordPress dashboard plugin which adjusts the look and feel of the dashboard, via custom themes and fonts.

Arindo Duque

Are you already tired of the way WordPress 3.8 looks?
Did you wish to be able to change and personalize, and even whitelabel some of the WordPress signatures on the WP Dashboard?
Note: We are officially returning to support his plugin, so <a href="http://weare732.com/en/home/#av_section_4" rel="nofollow ugc">let us know</a> if you have any feature suggestion or bug you want to see solved. A major release with a bunch of new features should be arriving soon.
Well, you can do all of that with Ultimo WP!
With Utimo WP Dashboard Theme you can:
<ol>
<li>Personalize the entire look and feel of the WordPress dashboard, based on 8 beautifully designed presets (and counting).</li>
<li>Personalize the login screen of the WordPress dashboard.</li>
<li>Whitelable some of the WordPress signatures, like the footer texts and adding your company logo to the dashboard and login page.</li>
</ol>
<a href="http://codecanyon.net/user/732/portfolio?ref=732" rel="nofollow ugc">Check out my premium plugins!</a>

Ultimo WP

Get a clean, beautiful and customizable new look on your WordPress Admin Dasboard.

Coffee Admin Theme vs Ultimo WP