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.
Html2canvas
Screenshots with JavaScript
Processing.js
A port of the Processing visualization language to JavaScript.
Raphael
JavaScript Vector Library
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Croppie
A Javascript Image Cropper
Canvg
Javascript SVG parser and renderer on Canvas
Bonsai
BonsaiJS is a graphics library and renderer
Snap.svg
The JavaScript library for modern SVG graphics.
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
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.
Konva
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Graphicsjs
A lightweight JavaScript graphics library with the intuitive API, based on SVG/VML technology.
P2.js
JavaScript 2D physics library
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
Obelisk.js
JavaScript Engine for Building Isometric Pixel Element with HTML5 Canvas
Proton
A particle engine for html5