Enlightenment is a completely themeable, highly configurable WindowManager for the X Window System, traditionally used in Unix environments. It is currently up to release 0.16-ish, commonly refered to as E16, while a mayor rewrite is underway (and has been underway for years) for Enlightenment 0.17 (E17) which is planned to become a full desktop environment.
Part of CategoryWindowManager
2 pages link to Enlightenment:
lib/main.php:944: Notice: PageInfo: Cannot find action page
lib/main.php:839: Notice: PageInfo: Unknown action
lib/blame.php:177: Warning: Invalid argument supplied for foreach()