i3 is described as 'Dynamic tiling window manager with clean, readable and documented code, featuring extended Xinerama support, usage of libxcb instead of xlib and several improvements over wmii' and is a popular Window Manager in the os & utilities category. There are more than 50 alternatives to i3 for a variety of platforms, including Linux, Wayland, BSD, Mac and Windows apps. The best i3 alternative is GNOME, which is both free and Open Source. Other great apps like i3 are Hyprland, Sway, COSMIC and niri.