QRCode / 2d Barcode api with both server side and client side support using canvas
QRCode.js is javascript library for making QRCode
QR Code Detection / Decoding / Generation
QR Code Generator implementation in JavaScript.
http://jeromeetienne.github.com/jquery-qrcode
Babel compiler core.
React is a JavaScript library for building user interfaces.
Higher-order functions and common patterns for asynchronous code
Lodash modular utilities.
Lightweight debugging utility for Node.js and the browser
A querystring parser that supports nesting and arrays, with a depth limit