Window Maker
From ArchWiki
Overview
Window Maker is a window manager (WM) running in X Window System. It is designed to emulate NeXT's GUI as an OpenStep-compatible environment. Characterized by low demand for memory and a flexible design. As one of the lighter WMs is well-suited to smaller machines.
Installation and configuration
To install Window Maker:
pacman -S windowmaker
Once installed create or edit the file $HOME/.xinitrc
as follows:
exec wmaker
Then to start Window Maker just run:
startx