Thumper is a simple and very light responsive grid system built with speed and simplicity in mind.
Right now, pending any crazy ideas that might pop into my head, I plan on building a plugin for thumper that has some prestyled badass-ness.
Sure! I can't guarantee how these perform or look because I don't maintain them, but they're sites built using Thumper.
http://www.robert-deluca.com/ - My personal site
http://reflectivetrafficsystems.com/
I'd love to see your sites built using Thumper :) You can here!