i3-inspired, highly customizable via YAML, supports multi-monitor setups. Power users & Linux converts.
komorebi is not for the faint of heart. It is a complete windowing system that uses (a hotkey daemon) for shortcuts. It supports floating windows, stacking layouts (like a deck of cards within a tile), bsp (binary space partitioning) layouts, and even custom layouts via JSON. It feels like a hybrid of bspwm and i3.