Currently I do a decent amount of wireframing in the browser. I find this too slow though, especially when dealing with complex interfaces that must work on mul

Currently I do a decent amount of wireframing in the browser. I find this too slow though, especially when dealing with complex interfaces that must work on multiple devices. Trying out a simple idea can mean writing a decent amount of CSS. It would be quicker if I could just draw a fluid box on a page somewhere.