Best open source admin dashboard & control panel theme. Built on top of Bootstrap 3, AdminLTE provides a range of responsive, reusable, and commonly used components.
Miminium is a fully responsive admin template. Based on Bootstrap 3 framework. modern design and full animation.
Gentellela Admin is a free to use Bootstrap admin template. This template uses the default Bootstrap 3 styles along with a variety of powerful jQuery plugins and tools to create a powerful framework for creating admin panels or back-end dashboards.
Theme uses several libraries for charts, calendar, from validation, wizard style interface, off-canvas navigation menu, text forms, date range, upload area, form autocomplete, range slider, progress bars, notifications and much more.