Gumby is a responsive and 960px-grid CSS grid framework that can be customized to work in every resolution with almost no effort.

Its fluid-fixed layout self-optimizes the content for desktop, tablet and mobile resolutions and there is support for nested grids.

Gumby CSS Framework

Similar to Twitter Bootstrap, it includes a web UI Kit of good looking buttons, forms, navigation + tabs and a tiny JavaScript file that brings these components to life.

Gumby has multiple versions to download: 12 columns, 16 columns, a hybrid one or an all-in-one package. And, there are PSD files provided to ease designing with the grid.

The framework is very well-documented, has demos for all of its features and totally free to use.

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