This is a mashup of Chris Coyier's "Don't Overthink It Grids", Foundation 4, and Unsemantic. I wanted a pure percentage grid framework, no padding, no gutters. It includes classes to push, pull, prefix, suffix, etc. And it includes mobile and tablet classes to help with changing layout at different viewports.
Not fully tested "mobile first" stylesheet added.
CSS for an evenly distributed grid, with "small" and "large" rules. Codepen.io example