What AutoHotkey scripts have you found that proved to be extremely useful?

I'll share one that I am using for multiple monitors.

Windows + Right: Move window from the left monitor to the right monitor

#right::
WinGet, mm, MinMax, A
WinRestore, A
WinGetPos, X, Y,,,A
WinMove, A,, X+A_ScreenWidth, Y
if(mm = 1){
    WinMaximize, A
}
return

Windows + Left: Move window from the right monitor to the left monitor

#left::
WinGet, mm, MinMax, A
WinRestore, A
WinGetPos, X, Y,,,A
WinMove, A,, X-A_ScreenWidth, Y
if(mm = 1){
    WinMaximize, A
}
return