jQuery.VideoBG plugin enables web designers to use an HTML5 video as a background or any div to a website very easily.    

HTML5 Sortable is a jQuery plugin to create sortable lists and grids using native HTML5 drag and drop API.   This sortable plugin has the following features: Less than 1KB (minified and gzipped). Built using native HTML5 drag and drop API. Supports both list and grid style layouts. Similar API and behaviour to jquery-ui sortable plugin. Works in IE 5.5+, Firefox 3.5+, Chrome 3+, Safari 3+, and Opera 12+.    

jQuery Bubble Popup is a plugin to display smart, animated & shadowed, "bubble" popups or tooltips with few lines of code in jQuery.   This tooltip plugin contains many features and it is fully compatible with IE, Firefox, Chrome, Opera and Safari.      

Filtrify is an advanced tag filtering plugin which contains multiple select feature and a nice looking navigation menu. With Filtrify, one can search tags within tags and filter items by multiple tags from different categories and get a live feedback on the number of items containing related tags.    

Scrollorama is a jQuery plugin for doing cool scrolly stuff.  It will take almost any HTML elements ( including images, videos, texts ) within a webpage and animate them in conjunction with the scrolling of web pages. This scrolling effects plugin includes many eye candy effects, such as fading, zooming, rotating or pinning an HTML element. One can use this scrolling animation plugin to design an astonishing web page easily. Besides Scrollorama, SuperScrollorama is also a choice for for des

jPages is a client-side pagination plugin. It gives user a lot more features comparing to most of the other plugins for this purpose, such as auto page turn, key and scroll browse, showing items with delay, completely customizable navigation panel and also integration with Animate.css and Lazy Load.   With this pagination plugin, you can easily set "items per page", "paging by title", "animations", and apply your paging to a table, gallery and so on.