From LXF Wiki

Enlightenment is the state of mind achieved when you don't care whether Emacs beats Vi.

It's also a popular window manager, initially designed with eye-candy in mind. In the late 1990s, Enlightenment was capable of translucent window dragging and super-snazzy themes, when everyone else was trying to get FVWM to look less naff. Enlightenment development is now focused on the 'DR17' branch -- taking it into desktop environment stage.

Affectionately known as 'E'.