qrcode generation standalone (doesn't depend on external services)
All GoJS samples, extensions, and documentation
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.
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
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.
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.