Advanced Responsive Grid System – Groundwork

Groundwork is a fully responsive HTML5, CSS and Javascript toolkit. It is flexible grid system enables you to do rapid development and easily adapt page layouts for mobile devices as well as the desktop and enables you to build one site that looks great on virtually any device.

advanced-responsive-grid-system-groundwork

Groundwork offers the most advanced responsive layout techniques in the world. Featuring an incredibly flexible, nestable, fluid grid system: the Groundwork grid system supports any columns in any fractional amount from halves to twelths. The result is a framework that works for virtually any immaginable modern layout. It has been built from the ground up with the incredibly powerful CSS preprocessor, Sass.

Demo: http://groundwork.sidereel.com/
Download: https://github.com/groundworkcss/groundwork
License: Apache License