Window snapping

Hey guys, I've been running Mint on my home computer for a little while now and I'm having a great time, however there's one behaviour from Windows I'm missing. When you hit win + arrows to snap the currently focussed window to the left or right half of the screen, windows will present a dialogue to select a companion window for the other half of the screen from your other floating windows. Does anyone know how best to implement something like this? I tried a tiling WM like i3, but that's a bit more... involved than what I'm looking for. Thanks!