dwm is described as 'dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed' and is an app in the OS & Utilities category. There are more than 25 alternatives to dwm for a variety of platforms, including Linux, BSD, Mac, Windows and PC-BSD. The best alternative is i3, which is both free and Open Source. Other great apps like dwm are Openbox (Free, Open Source), awesome (Free, Open Source), Sway (Free, Open Source) and bug.n (Free, Open Source).
spectrwm is a small dynamic tiling window manager for X11. It tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. It has sane defaults and does not require one to learn a language to do any configuration.
Left is a tiling window manager written in rust for stability and performance. The core of left is designed to do one thing and one thing well. Be a window manager. Because you probably want more than just a black screen LeftWM is built around the concept of theming.
JWM is a light-weight window manager for the X11 Window System. JWM is written in C and uses only Xlib at a minimum. Because of its small footprint, JWM makes a good window manager for older computers and less powerful systems, such as the...
Lumina is a lightweight, BSD licensed, standards-compliant desktop environment based upon Qt and Fluxbox. It is being developed on PC-BSD, and is being packaged for distribution on the PC-BSD package repository as well.