jQuery UI Effects Core

Extends the internal jQuery effects. Includes morphing and easing. Required by all other effects.

Magnific Popup

Fast, light, mobile-friendly and responsive lightbox and modal dialog plugin. Open inline HTML, ajax loaded content, image, form, iframe (YouTube video, Vimeo, Google Maps), photo gallery. Animation effects added with CSS3 transitions. For jQuery or Zepto.

ScrollMagic

The jQuery plugin for magical scroll interactions.

oriDomi

Fold up the DOM like paper.

Scrollorama

The jQuery plugin for cool scroll animation

jCarousel

jCarousel is a jQuery plugin for controlling a list of items in horizontal or vertical order. It provides a full-featured and flexible toolset for navigating any HTML based content in a carousel-like fashion.

jQuery++

I am a MIT licensed collection of extremely useful DOM helpers and special events for jQuery 1.8 and later.

Stellar.js

Parallax scrolling made easy.

jQuery Zoomooz

Zoomooz is an easy-to-use jQuery plugin for making any web page element zoom.