gerillass

Gerillass is an open-source toolkit that contains a set of Sass mixins to help designers and developers to create better, faster and consistent user interfaces.

postcss-insert

A postcss plugin that inserts one css classes properties into another, like Sass @extend...only better

@sassify/prefixer

Набор миксинов на языке CSS-препроцессора Sass для генерации CSS-свойств с необходимыми браузерными префиксами