There are a lot of responsive web design framework in the Internet ranging from the simple to the complex. For the simple ones, The 1140 Grid, Responsive Aeon 2.0, Columnal, Gridiculous, Ingrid, Responsive Grid System by Dennis LeBlanc, Responsive Grid System by Graham Miller, Titan, Ivory and Toast. For a more elaborate there, Base, Zurb Foundation, Gumby, Kube, Skeleton, and Twitter Bootstrap.
And here are the top 5 of Responsive Web Design Framework, those are commonly used nowadays :


