ProManager is an amazing admin panel template with tons of features, documented code and many possibilities for customization.
It has a very sleek design and will really be a cool replacement for the defaoult look of your admin panel.
Features
Main Top Menu with Dropdown Option
Top Sub Menu without Dropdown
Sidebar Menu
Custom Panel Block Icons Boxes with description and titles.
Breadcrumb Option
Custom Area for Save / Copy / Paste / Cancel / Delete Links with Icons for page editing and publishing usage.