Adminimal Administration Menu changes the style of the Administration menu module. It adds a nice and simple minimalist look and provides some tweaks to improve your Drupal administration experience. It also adds shortcut links that can be edited from the core shortcut module. The shortcut links fit nicely and have a small icon that separates them from the normal admin menu links.

Download the Adminimal Administration Menu

Download the Admin Menu If you don't have

Go to admin/module, find Administration menu, Administration menu Adminimal Theme and enable both.

Now your admin menu would be like this with nice look.

Responsive and mobile Friendly

The development version is now responsive and mobile ready. But it requires jQuery 1.7+. Check the requirements above.