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 Display the list of all your open windows by pressing the hot key (⌥ ⇥)*, and then you can switch to the window you wanted. You can close the window and move the window to another Space.

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

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Hot Corner You can switch the Space or the active window by scrolling or clicking on Hot Corner.

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Mouse Trigger You can resize and reposition the window by scrolling or clicking on the window's title bar or the window's control button. You can switch the active tab by scrolling on the tab bar.

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Window Management You can resize and reposition the window or move the window to another display by pressing the hot keys* or snapping the window.

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Video of Window Snap

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.
Previous Window You can switch to the previous active window by pressing the hot key (⌥ Space)*.

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Favorite Window You can switch to the window that you have previously registered as Favorite Window by pressing the hot key (⌥⇧ Space)* or from 1Piece menu.

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Send Window Backward You can send the active window backward, or cycle windows on the desktop by pressing the hot key (⌃⌥ ⇥)*.
Recently Minimized Window You can deminimize the recently minimized window by pressing the hot key (⌃⌘ M)* or from 1Piece menu.

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Focus Window You can activate the window on the left, right, top, bottom or behind the active window by pressing the hot keys*.

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Press Modifier Key Twice Execute a function in 1Piece, Launch or activate an app, Open a file or directory, Execute AppleScript or Automator workflow, by pressing a modifier key twice.

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Quit All Apps Quit all (or some) running apps.

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Reboot Apps Reboot running apps.

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Other Screen Shots, Hide All Apps, Move the mouse cursor, Hide the mouse cursor, Warp the mouse cursor, QuickTime Player Extensions.

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