21 Sep 2026 update: I no longer use Moom. I uninstalled it today, and Amethyst is now my only window manager.
I moved to Amethyst in May 2024 but kept Moom installed. Both apps used Cmd Shift 4: whenever Moom was open, that shortcut threw the window to the top third of the screen, then Amethyst snapped it back into its tile.
18 Jul 2022
Used for the last 5-6 years:
"Moom: Bringing order to chaos since 2011"
https://manytricks.com/moom/