Chosen is a jQuery plugin that makes long, unwieldy select boxes much more user-friendly.  

jQuery Cascading Dropdown is a simple and lighweight jQuery plugin for creating cascading dropdowns. You can set the

ScrollMagic is a jQuery plugin which essentially lets you use the scrollbar like a playback scrub control. It's

The Infinite Carousel is a jQuery plugin that allows you to showcase any number of

Share Button is a simple, light, flexible, and good-looking share button jQuery plugin.  

jQuery Verbose Calendar displays the whole days and months of a year at the same time.  

JointJS is a modern HTML 5 JavaScript library for visualization and interaction with diagrams and graphs. It can be used to create either static diagrams

S Gallery is accessible by keyboard and you can navigate through the images via keyboard shortcuts, and enter into fullscreen mode

jTruncate provides simple yet customizable truncation for text entities in your web page. 

jqtimeline is a lightweight, simple and elegent timeline plugin for jQuery to show a set of important events on a timeline. Data input