Susy
Responsive layout toolkit for Sass
...The default sass/susy comes with un-prefixed versions of the core API functions. If you want Susy to be name-spaced, import sass/susy-prefix instead. To add Susy to the Sass task, edit your Gruntfile.js at the root level of your project and look for the Sass-related rules. Add require: 'susy' inside the options object. Susy is also available in the CodeKit editor, with 10% of your purchase going to Black Girls Code when you follow the link from our site. You can also still access Susy2 documentation if necessary.