Submitted by Marco and Peldi of Balsamiq.
 
The YUI Grids, but done in Balsamiq Mockups.
 
http://developer.yahoo.com/yui/ for more info.

Contributed by Peldi upon request by Andraz Kozelj.
 
Two grouped grids. Both 960px wide, one with 12 columns and one with
16. Based on Nathan Smith's 960.gs work.