Bootsmooth is another UI Framework built with Sass / SCSS. Designed to be highly tweakable and light, it's purpose is to lessen the steps needed to get from design specifications to live web pages. It's not built to be everything, it's built to be productive.
You can get the source for the project using one of the methods below:
git clone http://github.com/cpearson3/bootsmooth-sass-ui.git
Include the CSS and JS files in your HTML:
<link rel="stylesheet" href="path/to/css/bootsmooth.min.css">