Amethyst vs Hammerspoon

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.

Hammerspoon is a productivity tool that macos automation framework that exposes system apis to lua scripting for window management and custom workflows. It is open source software.