Windows were initially interactive blocks in desktop applications, and have since evolved into portals for any software. Desktop and laptop computers are running Operating Systems which require many different panels and windows to work with. But even websites have begun adopting the idea of floating windows, modal popups, and fancy user panels.
In the gallery below I have collected some great examples of window design. The idea behind this trend is to separate functionality from other areas on the page. Added benefits come from a nicer user experience and even some dynamic content. If you can pull off the right look, floating windows are perfect for most any digital application.