Displace goes after a specific list of long-standing macOS multi-monitor annoyances rather than a general “monitor manager” pitch: the Dock jumping to whichever screen your mouse last touched, hot corners that stop firing once multiple displays are in play, and the cursor getting stranded on a display that’s been powered off. It lets you pin the Dock to one display and define how the cursor crosses between screens, and it ships free with a $10 Pro tier for the deeper controls.