skelJS is a very lightweight (weighing only 18kb) frontend framework for building responsive sites and apps. Consisting of only a single JS file, it gives designers and developers access to four powerful components:
Features
CSS Grid System
A sophisticated 12 column CSS grid system with a concise, uncluttered syntax, adjustable gutters, unlimited nesting support and many more cool features.
Responsive Handler
A streamlined replacement for CSS media queries designed to handle all of your responsive needs. Simple to configure, built to handle any number of breakpoints, and capable of doing much more than simply shuffle stylesheets.
CSS Shortcuts
Handy shortcuts to swiftly deal with all manner of common CSS tasks, like normalizing browser CSS (via normalize.css) and changing the global box model.
A powerful Plugin System
A platform for extending skelJS without compromising its lightweight footprint (see the Panels plugin for an example).