Glend is a DNN theme whose page content is all created with Content Builder, as well as the theme which has the fastest loading speed up to now. It includes 26 predefined modern theme templates, it is based on Bootstrap 4, and it is compatible with various mobile devices.
The Dnn Contra theme is a FREE Dnn skin that uses Bootstrap v4. It comes with over 23 pre-defined color schemes as well as options to customize the theme with 1000's of different colors using class built into the theme. Theme itself is highly customizable to fit with your website needs.