awesomewm

From their own website description:

awesome is a highly configurable, next generation framework window manager for X.
It is very fast, extensible and licensed under the GNU GPLv2 license.
It is primarily targeted at power users, developers and any people dealing
with every day computing tasks and who want to have fine-grained control on
their graphical environment.

Install

The install process is different for every Linux distro.
This guide can help you find your distro’s instructions to install.

Why Awesome WM Is Awesome

Reasons why I think awesome wm is totally awesome!

Configuration is done with lua. I think lua is the simplest programming
language and is great for allowing you to do what you want.
It makes working with graphical applications easy
Route applications of a certain type to a group just for those related items.
For example, all document editing programs like LibreOffice, Okular, etc. can
all be automatically routed to my documents tab when they are opened.
Great shortcuts for moving between applications.

My Configuration

My awesome lua configuration can be found in
MyCrossPlatformDotfiles
GitHub repository.

Specifically the link to the primary config file
rc.lua