The JavaScript InfoVis Toolkit provides tools for creating Interactive Data Visualizations (graphs, trees, charts...) for the Web.

Native iPhone and Android apps built with Web technologies.

function quux({a, b}) { return a + b; }
quux({a: 5, b: 10});

jQuery Tools is a collection of [the most important] user-interface components for today's websites. This single JavaScript file weighs only 5.8 Kb

PhoneGap is an open source development tool for building fast, easy mobile apps with JavaScript.

If you’re a web developer who wants to build mobile applications in HTML and JavaScript while still taking advantage of the core features in the iPhone, Android and Blackberry SDKs, PhoneGap is for you.

Also see 360° UI visualization prototype: http://www.schillmania.com/projects/soundmanager2/demo/360-player/canvas-visualization.html

Making the Test Automation for your web site, just that much easier.