J Query.black and White
Clientside grayscale images on any browser
Comic.js
Cartoon style drawing for HTML5 Canvas & Raphael.js & D3.js & SVG.js
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
jCanvas
A jQuery plugin that makes the HTML5 canvas easy to work with.
Color
JavaScript color conversion and manipulation library
Rimg
A responsive image solution for browsers that support mediaqueries. Pure javascript and no server-side code.
Im.js
Image Match - Project to allow compare different images pixel by pixel with good performance
P5.js
A JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing. http://twitter.com/p5xjs —
P2.js
JavaScript 2D physics library
Drawingboard.js
A canvas based drawing app that you can integrate easily on your website.
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
Gif.js
JavaScript GIF encoding library
Img to Ascii
A JavaScript implementation of a image to Ascii code
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.
Obelisk.js
JavaScript Engine for Building Isometric Pixel Element with HTML5 Canvas
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)
Cropper
A simple jQuery image cropping plugin.