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DockDoor is the app most people find first when they want Windows-style hover previews on a Mac.

AltTab does one thing: a Windows-style switcher that lists every window with a live thumbnail.

uBar is the long-running Windows-taskbar-for-Mac: window buttons, grouping, badges, per-monitor bars, positionable on any edge.

Sidebar is a heavily customisable Dock replacement with a start menu, stacks, window snapping and a searchable window switcher.

DockFix is a customisation dock: colours, opacity, custom icons, widgets, a file shelf and community presets, with a 5.0 rewrite that its site says aims for a native look.

ActiveDock is a launcher-flavoured Dock replacement with groups, folders, icon themes and a start menu.

Parallel Spaces and Superdock solve the same complaint, one Dock icon for all Chrome profiles, in opposite ways.

ExtraDock adds more docks: floating panels anywhere on any screen with widgets, shelves and app folders.

DockSpark is the closest neighbour: hover Chrome's Dock icon and a panel lets you open a profile or an incognito window.

InfyniDock makes every window a Dock target, with labels and previews, aimed at people who keep many projects and Spaces open.

boringBar drew 500 points on Hacker News for a simple taskbar that shows the windows in the current workspace instead of a Dock that, as its author put it, mixes everything together.

Apple's Dock is what Superdock is measured against, pixel for pixel.