Enlightenment is not just a window manager for Linux/X11 and others, but also a whole suite of libraries to help you create beautiful user interfaces with much less work than doing it the old fashioned way and fighting with traditional toolkits, not to mention a traditional window manager.
The window manager is a lean, fast, modular and very extensible window manager for X11 and Linux. It is classed as a "desktop shell" providing the things you need to operate your desktop (or laptop), but is not a whole application suite. This covered launching applications, managing their windows and doing other system tasks like suspending, reboots, managing files etc.
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