Sway is a window manager, not a DE. The right thing to compare it to is Mutter. I also use sway, but quite a few of my applications are from Gnome (like evince,

Sway is a window manager, not a DE. The right thing to compare it to is Mutter. I also use sway, but quite a few of my applications are from Gnome (like evince, nautilus, gnome-calendar, fractal...).