Autohotkey Capslock Remapping Script. Makes Capslock function as a modifier key to get cursor keys etc. on the left side of the keyboard, so you never have to move your hand to the right.

capslock_remap_alt.ahk

; Autohotkey Capslock Remapping Script 
; Danik
; More info at http://danikgames.com/blog/?p=714
; danikgames.com
; 
; Functionality:
; - Deactivates capslock for normal (accidental) use.
; - Hold Capslock and drag anywhere in a window to move it (not just the title bar).
; - Access the following functions when pressing Capslock: 
;     Cursor keys           - J, K, L, I
;     Enter                 - Space
;     Home, PgDn, PgUp, End - U, O, Y, H
;     Backspace and Del     - N, M
;
;     Insert                - B
;     Select all            - A
;     Cut, copy, paste      - S, D, F
;     Close tab, window     - W, E
;     Esc                   - R
;     Next, previous tab    - Tab, Q
;     Undo, redo            - , and .
; - Numpad at the right hand resting position when holding Ctrl+Shift+Alt (using keys m,.jkluio and spacebar)
;  
; To use capslock as you normally would, you can press WinKey + Capslock


; This script is mostly assembled from modified versions of the following awesome scripts:
;
; # Home Row Computing by Gustavo Duarte: http://duartes.org/gustavo/blog/post/home-row-computing for 
; Changes: 
; - Does not need register remapping of AppsKey using SharpKeys.
; - Uses normal cursor key layout 
; - Added more hotkeys for insert, undo, redo etc.
;
; # Get the Linux Alt+Window Drag Functionality in Windows: http://www.howtogeek.com/howto/windows-vista/get-the-linux-altwindow-drag-functionality-in-windows/
; Changes: The only change was using Capslock instead of Alt. This 
; also removes problems in certain applications.




#Persistent
SetCapsLockState, AlwaysOff



; Capslock + jkli (left, down, up, right)

Capslock & j::Send {Blind}{Left DownTemp}
Capslock & j up::Send {Blind}{Left Up}

Capslock & k::Send {Blind}{Down DownTemp}
Capslock & k up::Send {Blind}{Down Up}

Capslock & i::Send {Blind}{Up DownTemp}
Capslock & i up::Send {Blind}{Up Up}

Capslock & l::Send {Blind}{Right DownTemp}
Capslock & l up::Send {Blind}{Right Up}


; Capslock + uohy (pgdown, pgup, home, end)

Capslock & u::SendInput {Blind}{Home Down}
Capslock & u up::SendInput {Blind}{Home Up}

Capslock & o::SendInput {Blind}{End Down}
Capslock & o up::SendInput {Blind}{End Up}

Capslock & y::SendInput {Blind}{PgUp Down}
Capslock & y up::SendInput {Blind}{PgUp Up}

Capslock & h::SendInput {Blind}{PgDn Down}
Capslock & h up::SendInput {Blind}{PgDn Up}


; Capslock + asdf (select all, cut-copy-paste)

Capslock & a::SendInput {Ctrl Down}{a Down}
Capslock & a up::SendInput {Ctrl Up}{a Up}

Capslock & s::SendInput {Ctrl Down}{x Down}
Capslock & s up::SendInput {Ctrl Up}{x Up}

Capslock & d::SendInput {Ctrl Down}{c Down}
Capslock & d up::SendInput {Ctrl Up}{c Up}

Capslock & f::SendInput {Ctrl Down}{v Down}
Capslock & f up::SendInput {Ctrl Up}{v Up}


; Capslock + wer (close tab or window, press esc)

Capslock & w::SendInput {Ctrl down}{F4}{Ctrl up}
Capslock & e::SendInput {Alt down}{F4}{Alt up}
Capslock & r::SendInput {Blind}{Esc Down}


; Capslock + nm (insert, backspace, del)

Capslock & b::SendInput {Blind}{Insert Down}
Capslock & m::SendInput {Blind}{Del Down}
Capslock & n::SendInput {Blind}{BS Down}
Capslock & BS::SendInput {Blind}{BS Down}


; Make Capslock & Enter equivalent to Control+Enter
Capslock & Enter::SendInput {Ctrl down}{Enter}{Ctrl up}


; Make Capslock & Alt Equivalent to Control+Alt
!Capslock::SendInput {Ctrl down}{Alt Down}
!Capslock up::SendInput {Ctrl up}{Alt up}


; Capslock + TAB/q (prev/next tab)

Capslock & q::SendInput {Ctrl Down}{Tab Down}
Capslock & q up::SendInput {Ctrl Up}{Tab Up}
Capslock & Tab::SendInput {Ctrl Down}{Shift Down}{Tab Down}
Capslock & Tab up::SendInput {Ctrl Up}{Shift Up}{Tab Up}

; Capslock + ,/. (undo/redo)

Capslock & ,::SendInput {Ctrl Down}{z Down}
Capslock & , up::SendInput {Ctrl Up}{z Up}
Capslock & .::SendInput {Ctrl Down}{y Down}
Capslock & . up::SendInput {Ctrl Up}{y Up}


; Make Capslock+Space -> Enter
Capslock & Space::SendInput {Enter Down}


; Numpad using Ctrl+Shift+Alt + m,.jkluio or space
+^!Space:: SendInput {Numpad0}
+^!m:: SendInput {Numpad1}
+^!,:: SendInput {Numpad2}
+^!.:: SendInput {Numpad3}
+^!j:: SendInput {Numpad4}
+^!k:: SendInput {Numpad5}
+^!l:: SendInput {Numpad6}
+^!u:: SendInput {Numpad7}
+^!i:: SendInput {Numpad8}
+^!o:: SendInput {Numpad9}


; Make Win Key + Capslock work like Capslock (in case it's ever needed)
#Capslock::
If GetKeyState("CapsLock", "T") = 1
    SetCapsLockState, AlwaysOff
Else 
    SetCapsLockState, AlwaysOn
Return





; Drag windows anywhere
;
; This script modified from the original: http://www.autohotkey.com/docs/scripts/EasyWindowDrag.htm
; by The How-To Geek
; http://www.howtogeek.com 

Capslock & LButton::
CoordMode, Mouse  ; Switch to screen/absolute coordinates.
MouseGetPos, EWD_MouseStartX, EWD_MouseStartY, EWD_MouseWin
WinGetPos, EWD_OriginalPosX, EWD_OriginalPosY,,, ahk_id %EWD_MouseWin%
WinGet, EWD_WinState, MinMax, ahk_id %EWD_MouseWin% 
if EWD_WinState = 0  ; Only if the window isn't maximized 
    SetTimer, EWD_WatchMouse, 10 ; Track the mouse as the user drags it.
return

EWD_WatchMouse:
GetKeyState, EWD_LButtonState, LButton, P
if EWD_LButtonState = U  ; Button has been released, so drag is complete.
{
    SetTimer, EWD_WatchMouse, off
    return
}
GetKeyState, EWD_EscapeState, Escape, P
if EWD_EscapeState = D  ; Escape has been pressed, so drag is cancelled.
{
    SetTimer, EWD_WatchMouse, off
    WinMove, ahk_id %EWD_MouseWin%,, %EWD_OriginalPosX%, %EWD_OriginalPosY%
    return
}
; Otherwise, reposition the window to match the change in mouse coordinates
; caused by the user having dragged the mouse:
CoordMode, Mouse
MouseGetPos, EWD_MouseX, EWD_MouseY
WinGetPos, EWD_WinX, EWD_WinY,,, ahk_id %EWD_MouseWin%
SetWinDelay, -1   ; Makes the below move faster/smoother.
WinMove, ahk_id %EWD_MouseWin%,, EWD_WinX + EWD_MouseX - EWD_MouseStartX, EWD_WinY + EWD_MouseY - EWD_MouseStartY
EWD_MouseStartX := EWD_MouseX  ; Update for the next timer-call to this subroutine.
EWD_MouseStartY := EWD_MouseY
return

Do you know of a way to add a script like this as a startup item in Windows 10?

@jeffreysbrother If you have ahk installed, you can compile the script via the context menu and then set up the resulting .exe to autostart like any other program.

Good job. Thanks.

I was using xmodmap for linux and have been trying to find a solution. Works like a charm. Thanks.

Hi, thanks for the script
How can we add F1 -F12 via Capslock+1,2,3 and so on?
Actually, I've tried to add the following section:
; Capslock + 1234567890-= (F1-F12) Capslock & 1::Send {F1} Capslock & 2::Send {F2} Capslock & 3::Send {F3} Capslock & 4::Send {F4} Capslock & 5::Send {F5} Capslock & 6::Send {F6} Capslock & 7::Send {F7} Capslock & 8::Send {F8} Capslock & 9::Send {F9} Capslock & 0::Send {F10} Capslock & -::Send {F11} Capslock & =::Send {F12}
But if I want to use in conjuction with ALT (for example to send Alt+F4) it only sends a F4 function, and doesnt pay to Alt pressed.

Works great. Thanks for sharing. Was trying to map to map LAlt to LCtrl when CapsLock is pressed, coz LAlt is at a more convenient place than LCtrl and I use Ctrl more often. Eg. LAlt+Capslock+J to LCtrl+LeftArrow.