SeconDock
A real Dock on every display. macOS gives you one Dock on one screen; SeconDock mirrors it to every other display. Free for 3 days, then one payment.
A paid app from the studio, not a free download. Its own page has the details and the price.
New on the shelf, in your inbox
One short email when new material lands. Double opt-in, one-click unsubscribe, and the address is used for nothing else.