dockdoor

Install command: 
brew install --cask dockdoor

Name: DockDoor

Window peeking utility app

https://dockdoor.net/

Cask JSON API: /api/cask/dockdoor.json

Cask code: dockdoor.rb on GitHub

Current version: 1.21.2

Current version requires: macOS >= 13

Analytics:

Installs (30 days)
dockdoor 736
Installs (90 days)
dockdoor 2,269
Installs (365 days)
dockdoor 6,818