Useful external libraries

Sass

• Simptip - simple tooltips
• Sunglass mixin library
• Bourbon mixin library
• SassyLists - Index
• Scut — a collection of Sass utilities to ease and improve our implementations of common style-code patterns.
• Sass Style Guide | CSS-Tricks
• Typeplate » A typographic starter kit encouraging great type on the Web
• lolmaus/breakpoint-slicer
• Bookcasey — Harsh Compass Extension
• Sassmeister

Grids

• Bourbon Neat
• Susy: Responsive grids for Compass
• Singularity

Javascript

• Lo-Dash - A utility library delivering consistency, customization, performance, & extras
• ES5 Shim - ECMAScript 5 compatibility shims for legacy JavaScript engines
• Sugar.js - Sugar is a Javascript library that extends native objects with helpful methods.
• Verge - Get viewport dimensions, detect elements in the viewport

CSS Animation and effects

• Effeckt.css
• https://github.com/jackilyn/animate.scss
• http://tympanus.net/Development/CreativeButtons/

Alternative Styling

• Grid Forms · Data entry made beautiful