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.

kodeo

Kodeo Admin UI turns your WordPress backend into a clean and modern user interface. 
All elements are well designed and arranged for the best user experience.
If you want to report a problem or maybe you have a feature request, please send an email to support@kodeo.de
If you like Kodeo Admin UI, please leave a review here on WordPress. Thank you!
<h4>Features</h4>
<ul>
<li>Elegante and stylish admin theme</li>
<li>Super clean user interface</li>
<li>Fully compatible with all WordPress versions since 4.0</li>
<li>Works well with most 3rd party plugins (no layout conflicts)</li>
<li>Tested with all popular Browsers</li>
<li>Lightweight code</li>
<li>Lots of theme options</li>
<li>Customization</li>
</ul>

Kodeo Admin UI

Kodeo Admin UI turns your WordPress backend into a clean and modern user interface

Coffee Admin Theme vs Kodeo Admin UI