Ari Stathopoulos

A clean, minimalistic administration theme inspired from the new customizer look of wordpress 3.4.1 
It’s pretty basic and adds a css file to your administration.
Since this plugin was created I have used the knowledge that I have acquired to build the bootstrap admin theme, which I would recomend you use instead of this one. 
You can get it here: https://wordpress.org/extend/plugins/bootstrap-admin/
This project was built for the http://magazi.org network of stores.

Magazi Admin Theme

A clean, minimalistic administration theme inspired from the new customizer look of wordpress 3.4.1

Bob Orchard

WordPress’s admin themes are great, but we wanted to take it a step further. This is a clean blue/gray theme by default for the admin panel that simplifies the interface and makes things more accessible for our customers. Customize your colors by visiting Settings > General
If there are any features you’d like to see or bugs with other plugins – visit the support tab and let me know.
<h3>Improvements made</h3>
<ul>
<li>Blue AdminBar for front and backend of site</li>
<li>Soft Gray menu</li>
<li>Larger Calls to Action within Edit screens</li>
<li>Ability to change custom primary/secondary colors</li>
<li>Mobile Menu compatibility</li>
</ul>

Fancy Admin UI

Clean, blue theme that's customizable for the Wordpress Admin panel and Admin Bar

Magazi Admin Theme vs Fancy Admin UI