Tremula Js
TremulaJS: Picture Streams + Momentum Engine + Bézier Paths + Multi-Device
Beerslider
A vanilla JS keyboard accessible plugin for any before-after comparison
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)
Focal Point
A small set of CSS classnames to help keep images cropped on the focal point for responsive designs. Using only HTML/CSS, web authors can specify an image's focal point, which stays as the image's primary focus, while the image's available width changes on responsive webpages. Crop and re-size images depending on available width and let CSS to do all of the work, and without any JavaScript.
Snap.svg
The JavaScript library for modern SVG graphics.
Ejecta
A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS
Philogl
A WebGL Framework for Data Visualization, Creative Coding and Game Development
Html2canvas
Screenshots with JavaScript
X3dom
X3DOM. A framework for integrating and manipulating X3D scenes as HTML5/DOM elements.
Responsive Slides
Simple & lightweight responsive slider plugin (in 1kb)
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Sylvester
Vector, matrix and geometry math JavaScript
Gif.js
JavaScript GIF encoding library
jQuery Focuspoint
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.
Processing.js
A port of the Processing visualization language to JavaScript.
Bxslider 4
Responsive jQuery content slider
Baraja
Baraja is a jQuery plugin that allows to move elements in a card-like fashion and spread them like one would spread a deck of cards on a table.