Multifunctional App for Mac 1Piece includes many features to improve the usability of your Mac. Window List that displays the list of all your open windows, a feature that switches the Space or the active window by using Hot Corner, a feature that resize and reposition the window and so on.
Window List You can switch the window from the list of all open windows by pressing the hot key (⌥ ⇥)*. You can also close a window, and move a window to another Space.

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Desktop Windows You can switch the window from the thumbnail list of all windows on the desktop by pressing the hot key (⌥⌘ ⇥)*. You can also resize and reposition a window, and move a window to another display.

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Window Manager You can resize and reposition windows by hot keys, menus or snapping.

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Hot Corner You can use the corners of the display as Hot Corners, to perform a variety of features by mouse actions on the hot corners.

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Mouse Trigger You can perform a variety of features by mouse actions on the specific locations such as the window's title bar and tab bar.

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Previous Window You can switch to the previous active window by pressing the hot key (⌥ Space)*. The floating thumbnail is shown at the bottom of the desktop by pressing the hot key (⌥⇧ Space)*.

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Favorite Window You can switch to the window that you have previously set as Favorite Window by pressing the hot key or from the menu.

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Deminimize Window You can deminimize the minimized window by pressing the hot key (⌃⌘ M)* or from menus.

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Send Window Backward You can send the active window backward, and cycle windows on the desktop by pressing the hot key (⌃⌥ ⇥)*.
Focus Window You can activate a window on the left, right, top, bottom or behind the active window by pressing the hot keys (⌥⌘ ←, ⌥⌘ →, ⌥⌘ ↑, ⌥⌘ ↓, ⌥⌘ ↵)*.

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Move Mouse Cursor You can move the mouse cursor to the center of the active window or display by pressing the hot key (⌃⌥⌘ M)*.
Hide Mouse Cursor You can hide the mouse cursor by pressing the hot key (⌃⌥⌘ H)*.
Warp Mouse Cursor After pressing the hot key (⌃⌥⌘ Space)*, you can warp the mouse cursor to the specific locations by pressing a shortcut key or moving your mouse slightly.

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App Menu Bar You can open the app menu bar as contextual menus by pressing the hot key (⇧⌘ 1)*. The favorite feature gives you to quickly execute menu items and execute AppleScript and Automator workflow.

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Switch Active App Switch the active app when the app's all windows on the desktop are minimized or closed.

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Hide / Show Dock Automatically toggle “Automatically hide and show the Dock” when switching the active app.
Adjust Windows Automatically adjust the size and position of the app's windows when the app is activated. Maximize windows larger than a certain size, or move windows not to protrude from the desktop.
Modifier Key Twice You can perform a variety of features by pressing a modifier key twice. They are features within 1Piece, launching or activating an app, opening a file or directory, and executing AppleScript or Automator workflow.

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Stage Manager Extensions** You can switch the central stage by pressing the hot keys (⌥⌘ A)*.

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Quit All Apps You can quit all (or some) running apps.

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Reboot Apps You can reboot running apps.

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Others QuickTime Player Extensions, Screen Shots, Hide All Apps.

* You can change the hot keys in 1Piece Preferences.

** Available on macOS 13 (Ventura) or late.