Now I share the theme Humarkise (primarily developed for the site http://de.humanet.tk), which seems to be one of the first liquid ones for GetSimple. This is a two-column theme with a completely liquid layout supporting display widths below 800 px (up to your visual taste).

Etymology
Markise is a German word for awning, as you can (hopefully) recognize in the design.

How it looks like


Obtain it
from http://get-simple.info/extend/theme/humarkise/291/