Custom made admin user interface will take a lot of time and usually cost you a fortune. Here is a useful showcase of best premium admin templates for your inspiration. Each theme provide strong documentation and resource files along with all functionalities available on live demos. I hope you do find this post useful and will help you in your next project.
Black Admin v2
Hello! Admin – Beautiful & Powerful Backend UI
Reality Admin
Sharp Admin Template
Sleek Admin Clean CSS Admin Skin
Titanium
Broom Cupboard Admin Skin
Silky Admin
AP Administration Panel
Meta Admin v1
FreshCMS an almost complete CMS skin
