Bxslider 4
Responsive jQuery content slider
Magnific Popup
Light and responsive lightbox plugin with focus on performance.
Cycle2
2nd gen cycling
Vegas
Vegas is a jQuery plugin to add beautiful fullscreen backgrounds to your webpages. It even allows Slideshows.
J Query.black and White
Clientside grayscale images on any browser
Html2canvas
Screenshots with JavaScript
Noisy
A jQuery plugin that adds random noise to the background of a given element.
Sequence
The Responsive Slider with Advanced CSS3 Transitions
Flex Slider
An awesome, fully responsive jQuery slider plugin
Comic.js
Cartoon style drawing for HTML5 Canvas & Raphael.js & D3.js & SVG.js
Breathing Halftone
Images go whoa with lots of floaty dots
Featherlight
Featherlight is a very lightweight jQuery lightbox plugin. It's simple yet flexible and easy to use. Featherlight has minimal css and uses no inline styles, everything is name-spaced, it's completely customizable via config object and offers image, ajax and iframe support out of the box. Featherlights small footprint weights about 4kB – in total.
Imager.js
Responsive images while we wait for srcset to finish cooking
Math Box.js
MathBox is a (work in progress) library for making presentation-quality math diagrams in WebGL.
FancyBox
FancyBox is a tool that offers a nice and elegant way to add zooming functionality for images, html content and multi-media on your webpages.
Colorbox
A light-weight, customizable lightbox plugin for jQuery
Raphael
JavaScript Vector Library