Enllax is an ultra-lightweight and super easy to use plugin for parallax scrolling effect.
Parallax-Scroll is a jQuery plugin to create elements with background images that behaves as if their background-attachment property is between scroll and fixed, similar to the parallax scrolling effect you see on Spotify
ScrollMagic is a jQuery plugin which essentially lets you use the scrollbar like a progress bar.
qpScroll is a jQuery plugin that creates a parallax background for any page or div. It is simple to setup. It can be added to any existing page without the need to change the HTML mark up.
jInvertScroll is a lightweight plugin for jQuery that allows you to move in horizontal with a parallax effect while scrolling down.It's easy to setup and requires nearly no configuration.
Parallax.js is simple, lightweight Parallax Engine that reacts to the orientation of a smart device. Where no gyroscope or motion detection hardware is available, the position of the cursor is used instead.
Starscroll is a jQuery plugin that adds a fullscreen starfield, generated in canvas, controlled by css to any div. The parallax responds when user scrolls (no matter how big your content), or when is set to animate.
Scrolly is a super simple and easy to use parallax plugin for jQuery.