Volkside design company made a gift for web developers, releasing free bookmarklet tool – Wirify. With Wirify you can create wireframe of any website with just one click.
This is very useful tool to quickly assess some aspects of website design: a modular system of layout, visual hierarchy, white space, symmetry, golden section, the rule of thirds, etc.
You can just simply drag this bookmarklet to your bookmarks and use it on any page. It works with all modern browsers.
Rendering on jQuery is not always perfect, sometimes there are slight distortions. The export of website wireframe is not supported in Wirify, but you can use some plugins to save the web page as an image: Screengrab for Firefox and Screen Capture for Chrome.
If you, as a web designer, have to deal with wireframes, then it makes sense to look on other tools. For example, the developers of jMockups web tool promise to add a feature for importing wireframes of any web page in a couple of mouse clicks. That means you can just go and borrow someone’s layout for your own web design without breaking any copyrights.
By the way, developers of Wirify also wants to add this kind of feature, but it will export website wireframes directly to OmniGraffle (Mac OS X and iPad analog of MS Visio).