Amethyst vs Rectangle

Amethyst is a free, open-source tiling window manager for macOS inspired by xmonad. It automatically arranges application windows into non-overlapping layouts using keyboard shortcuts, without requiring System Integrity Protection to be disabled. Amethyst supports multiple layout algorithms including tall, wide, fullscreen, and column layouts.

Rectangle is Free open-source window management app for macOS with keyboard shortcuts.. It is available under a free model. This tool falls under the productivity category.