In Pictures: Windows 8 app shootout - ModernMix v ...
Both ModernMix and RetroUI Pro let you resize a window that’s running an app inside it by dragging its sides and corners. When resizing such a window under either application, the appearance of most of the Windows apps I tested would scale down and up well. This, of course, depended on how complex the layout of an app was: a simple-looking app, such as the default Sound Recorder tool of Windows 8/8.1, lends itself to a greater latitude for resizing than a “busier” looking app, such as OneNote, with UI elements originally designed to fill the entirety of a full screen.
In Pictures: Windows 8 app shootout - ModernMix v RetroUI Pro