isInViewport.js

An ultra-light jQuery plugin that tells you if the element is in the viewport, but with a twist.

jQuery ScrollSpy

jQuery plugin for detecting enter/exit of elements in the viewport when the user scrolls

Qoopido Emerge

jQuery plugin to react on elements entering or nearing the visible area.

jQuery.PositionCalculator

Calculate the position of an element relative to another element or event. It has also functionality to handle collision within the viewport of a given container. It does not manipulate CSS or DOM, it only calculates values. It is a basic technology to support implementation of tooltips, popups, popovers, scrollspies, sticky navi and many more.

jQuery Viewport

Makes an element as a handy viewport for displaying content with absolute position.

jQuery Stage

jQuery Stage is a jQuery plugin for detecting information about the stage, the browser’s viewport.

inViewPort

jQuery plugin that adds a CSS class to selected elements when they have been scrolled into the viewport for the first time.

Near Viewport

jQuery selector to find elements near the viewport.

jQuery.scrollFocus

Powerful programmable scrolling – scroll elements, DOM ranges or arbitrary points into configurable viewports