rainyday.js is a simple script for simulating raindrops falling on a glass surface.   It is a JavaScript library that makes use of the HTML5 canvas to render an animation of raindrops falling on the surface of any image.      

FerroSlider is a free, responsive and customizable jQuery plugin that allows you to organize the contents of websites in a unusual and cool way and navigate through them with a sliding effect. With FerroSlider, one can organize any type of content, such as images, text, pages, lists and so on. You can use it as a sliding gallery or as slider for a one-page-website. FerroSlider uses standard HTML and CSS rules and is responsive and compatible with all the major browsers and with the two main

least.js is a random and responsive HTML5 & CSS3 jQuery gallery plugin with lazyload.    

jQuery Singalong is an annotate plugin for html5 <audio> and <video>. This singalong plugin is responsible for showing the annotations at desired start and stop times, it can add full HTML annotations to HTML5 <video> or <audio> elements.   It uses the HTML5 media elements API and can be used for: lyrics sing-alongs (woo!) rich text callouts captions youtube-style video annotations (useful for video podcasts)    

vintageJS makes user able to add a retro/vintage effect to images easily by using the HTML5 canvas element. One can decide to use vintageJS as a jQuery plugin, as an AngularJS module or implement the vanilla version without any dependencies.      

Fresco is a beautiful responsive lightbox.  It can be used to create stunning overlays that work great at any screen size, in all browsers on every device. To make things even more awesome Fresco comes with fullscreen zoom, retina-ready skins, support for swipe events, Youtube and Vimeo integration for HTML5 video and a powerful Javascript API.      

HTML5 Placeholder is a jQuery plugin that enables HTML5 placeholder behavior for browsers that do not support it. This placeholder plugin works in all A-grade browsers, including IE6.      

  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.