Mockingbird BetaNovember 5th, 2009
Mockingbird, is not yet just another online wireframing tool. This fully web based beta software based on the Cappuccino framework, comes with a few interesting features that will make the life of UI designers a bit easier. One of these is the ability to share work online directly as a link. Another cool one is the ability to resize objects or components while their properties and innards automatically scale.
Other than that, the rest of the features are also very much useful, but have been visible in other tools already. These include the ability to double click on a UI component and edit its properties as text. Another one is the ability to drag components and make clickable links between pages. I like it very much and am curious when the full version will be released, as the interaction feels good.
For now, you can try the beta online for free.