Snap Mac windows to halves and corners (Gablet)

Throw the window under your cursor to a half, the center, a corner, or two-thirds with Quick Throw.

Quick Throw moves one window to a built-in size: a half, the center, a corner, or two-thirds. The window under the cursor can move even when it is not focused. Dragging to an edge is snap, not a throw.

Throw it

You can download Gablet.Open Gablet from the menu bar.
In Settings, turn on Quick Throw and record the modifier keys you will hold.
Grant Accessibility if windows do not move. Quit Gablet and open it again.
Hold the modifiers, move the cursor toward the half, corner, center, or two-thirds, then release.

Put the cursor over the window you want. The wrong window moves when the cursor is over a different one.