dwm
dwm is a 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.
19 Alternatives To dwm
Phoenix
Brief Description of Phoenix software: Phoenix is a light platform that acts as a macOS and windows application manager and is scriptable with JavaScript. Read more about Phoenix.
Xfce
Xfce is a lightweight desktop environment for UNIX-like operating systems. It aims to be fast and low on system resources, while still being visually appealing and user friendly.