I can't believe I have missed out on using this for most of a year!

"Material Design Lite (MDL) is a library of components for web developers based on Google's Material Design Philosophy"

Visual Studio Emmet is a visual studio plugin for Emmet, a web-developer’s toolkit that can greatly improve your HTML & CSS workflow.

This guy is on a whole 'nother level.

Splitting items into two separate lists, with counts. Click an item to toggle. No JavaScript. Blog post: http://codersblock.com/blog/checkbox-trickery-with-css/

Author speaks with maybe some unwarranted certainty about the future, but this could be a good way to automate modular CSS.

CSS preprocessors are a phase, and we're nearing its end. (About time!)