Profound Grid is a fresh grid system for creating responsive fixed and fluid layouts.
The grid system uses semantic markup and renders just the same in all browsers (it is using negative margins to calculate columns).
It is built with SCSS, has support for nested grids and rules for pulling/pushing columns.
There are various examples provided in Profound Grid’s website and a documentation helps learning it (which is pretty straightforward).
Website: http://www.profoundgrid.com/
Compatibility: All Major Browsers