Smooth Scroll

Smooth Scroll is a lightweight script for animating the scrolling of anchor links. It includes multiple easing options for smoother animations. Visit Link

Headroom.js

Headroom.js is a lightweight, high-performance JS widget (with no dependencies!) that allows you to react to the user’s scroll. The header on this site is a living example, it slides out of view when scrolling down and slides back in when scrolling up. Visit Link

Comcast/Xooie

Xooie is a library of JavaScript UI widgets designed to be extremely modular and agnostic of markup and styles. With Xooie, you can create almost any interface you want. Key components are tagged with data attributes, informing Xooie to bind the associated widget functionality. Visit Link