Bspwm

bspwm is Article description::a lightweight, tiling, minimalist [[window manager that is written in C and represents its windows as leaves on a binary tree.]] Its installed size is less than 600 KB (even with the  USE flag enabled). It only responds to X events and messages it receives on a dedicated socket from a program included in its package,.

Emerge
To install using Portage merely issue the command:

is used for keybindings and pointer bindings so one may wish to install it too with: