Simple HTML5 Charts using the <canvas> tag

Give your JS App some Backbone with Models, Views, Collections, and Events

JavaScript's utility _ belt

Minimal templating with {{mustaches}} in JavaScript

Multiple file upload plugin with image previews, drag and drop, progress bars. S3 and Azure support, image scaling, form support, chunking, resume, pause, and tons of other features.

String manipulation helpers for javascript

qTip2 - Pretty powerful tooltips

Enhances Date.parse to support ES5 ISO-8601 strings in all environments.