if you do not want to use any content management system but build your own, you can use admin panel themes. The admin panel gives the flexibility to build your logic and enhance the functionality as much as you want.
Freakpixels gives you hundreds of admin dashboard templates which already covers a wide range of functionalities. If you are looking for admin panel themes that are in their best view in any kind of device, you can download bootstrap admin templates or responsive admin panel templates.