At 2kb, it's a pretty lightweight way of adding some heavyweight scroll effects. Design Shack has an in-depth tutorial explaining usage.

This tutorial by Mary Lou on Codrops shows you how to create a sliding box navigation using the jQuery easing plugin and CSS3. The effect is truly eye-catching.

Hoverwords is a slick plugin, that when combined with Lettering.js, creates a really cool effect of sliding letters. When applied to an anchor, letter by letter can be replaced when the user hovers over.
Check out the demo here.