qrcode generation standalone (doesn't depend on external services)
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.
A simple library to view large images up close using simple mouse interaction, and the full screen.
A very lightweight jQuery plugin to lazy load images
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.
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
All GoJS samples, extensions, and documentation
Simple isometric graphics library for HTML5 canvas
JQuery lightSlider is a lightweight responsive Content slider with carousel thumbnails navigation
Vegas is a jQuery plugin to add beautiful fullscreen backgrounds to your webpages. It even allows Slideshows.