iScroll can handle any element that needs to be moved with user interaction. It adds scrolling, zooming, panning, infinite scrolling, parallax scrolling, carousels to your projects and manages to do that in just 4kb. Give it a broom and it will also clean up your office.
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.
Lazy Load XT is a mobile-oriented, fast and extensible jQuery plugin for lazy loading of images/videos with build-in support of jQueryMobile framework.
Headroom.js is a lightweight, high-performance JS widget that allows you to react to the user's scroll. The header slides out of view when scrolling down and slides back in when scrolling up.
jQuery LocalScroll plugin will animate a regular anchor navigation. It will allow your visitors to navigate your site with a smooth scrolling effect.
jQuery SerialScroll plugin allows you to easily animate any series of elements, by sequentially scrolling them. It uses jQuery.ScrollTo to achieve the scrolling animation. It is a very unrestricted plugin, that lets you customize pretty much everything from outside. You can use horizontal or vertical scroll, also combined.
visualNav is a jQuery plugin that modifies a navigation menu to highlight / change when the menu's target smooth scrolls into view.
onScreen is a jQuery plugin that does stuff to elements when they enter or leave the viewport.
You can use it as
Scrolltab is a jQuery plugin that adds tabs visually associated to their position relative to the scroll bar.
This enables a developer to attach floating tabs to the scrollbar of the browser that will scroll the user to the position indicated by the tab. This tab is expandable with content within.
Scrollocue is a jQuery plugin for building a simple autocue/teleprompter system, to scroll through lines of text.
Walk through the autocue text with the arrows, space bar or just click.
Jump To is a jQuery plugin that let you create a smooth jump to sub navigational menu in one JS call. The menu can be used to assist your navigation for pages with a lot of content.
fullPage.js is a jQuery plugin to create fullscreen scrolling websites in a simple way. It adds an smooth scrolling to the one page site with vertical and landscape sliders forming the site. Compatible with old browsers.