UWM is a window manager that is used in UDE, which is meant to be a complete GUI.
Ranked in these QuestionsQuestion Ranking
Pro Window hex menu
UWM utilizes a hex menu for interaction with each application menu. This allows each window to forgo the normal open/close buttons found on the border, giving each window a very uniform look. The hex menu is brought to focus by clicking on any application's window border.
Pro Easily accessible online documentation
While some portions of the documentation are incomplete, the important parts (first start, command line options, configuration, etc.) are well written and easy to find.
Pro Can be used on almost any Unix-like OS
UWM can run on just about any Unix-like OS as it is extremely lightweight and only has one required dependency: X11.
Con Limited keyboard shortcuts
There are limited keyboard shortcuts supported in UWM (though more are planned for upcoming releases).