wtftw is described as 'Window Tiling For The Win. A tiling window manager written in Rust' and is an app in the OS & Utilities category. There are more than 25 alternatives to wtftw for a variety of platforms, including Linux, BSD, Mac, Windows and FreeBSD. The best alternative is i3, which is both free and Open Source. Other great apps like wtftw are Openbox (Free, Open Source), awesome (Free, Open Source), Xmonad (Free, Open Source) and Sway (Free, Open Source).
Heavily Inspired by i3wm. Wmderland aims to simplify the core functionalities of i3wm, and bundle in the essential features required for a modern but minimal Tiling Window Manager. Written in C++ using Xlib.
StumpWM is a tiling, keyboard driven X11 Window Manager written and scriptable in Common Lisp. StumpWM attempts to be customizable yet visually minimal. There are no window decorations, no icons, and no buttons.