ixEdit is a JavaScript-based interaction design tool for the web. With IxEdit, designers can practice DOM-scripting without coding to change, add, move, or transform elements dynamically on your web pages. It's specifically designed for HTML prototyping and allows designers to build interactive interfaces directly in the browser, and provides the code to copy and paste into the HTML page.
Works with Firefox, Safari, Chrome, or IE. Watch the video below to see how it works.
I haven't minded writing the jQuery for the prototyping toolkit I've been working with, but this is much better for a lazy, sloppy coder like me. So I'm including this as well.
Via @5w