Common display managers (or login managers) include LightDM, GDM, Ly, etc. Most of them are written in C, and often only support GUI or command line interface. greetd is written in rust and supports command line and a graphical interface (greeter).

Recently working with labwc, I gradually found some small problems. I will record them here for the convenience of future generations.

If you are tired of monolithic desktop environments such as Gnome and KDE, and don't want to toss tiling Wayland compositors such as sway, you can try labwc stacking windows (window-stacking Wayland compositor).