Ambient
A clean and simple one column theme
All themes
Basic
Just the basics
Big Text
Responsive with large text
Dusk
Dark two column theme
Mini Grid
Square grid with sidebar
Nano
Minimal and responsive
Online
Responsive multi-column with customizable header and sticky sidebar
Solar
Single column with many sidebar widgets
Square
Compact one column theme
Win2K
Windows 2000 style, with one, two, or three column modes
Win31
Windows 3.1 style, with one, two, or three column modes