Add AquaSnap hotkeys to focus on the window above/below/right/left of current window
It would be great if there were hotkeys available to focus on the window to the right of the currently focused window, or to the left, above, or below. This would allow one to work efficiently across multiple applications without using the mouse, and bypassing the Alt-Tab UI, using these hotkeys to "navigate" the focus around the desktop in an intuitive way. It would be very similar to how some Linux tiling window managers like xmonad work.
It should work across monitor boundaries.
I realize that determining which window is, e.g., "above" the current window may be ambiguous when the windows are not perfectly tiled, but you could use a simple heuristic like "the leftmost window whose origin is above the current window's origin and whose rightmost extent is to the right of the current window's origin."