Handy Sass “Mixins”

Sass Style Guide

Compass Mixins

A Simple and Lightweight Mixin Library

Useful SASS Mixins Library

Reusable Mixins

Really Simple Media Queries

Serving High Resolution Background Images

Sassaparilla Grid

Sass MediaQueries

Set Text on the Web to a Baseline Grid

A Grid System for Humans

A Lightweight, Responsive CSS Layout Engine

Unicorn UI Buttons

Sassy Buttons

Bootstrap Sass