Window Maker

From LXF Wiki

Window Maker aims to emulate the look and feel of NEXTSTEP, a desktop operating system from the 1990s. It has a 'dock' on the right, onto which you can drop program launchers, and running programs are represented as desktop icons a la Windows 3.1. To bring up the program menu, the user right-clicks on an empty area of the desktop. Despite not reaching a 1.0 release, Window Maker is still stable and well suited to everyday use.