I would mention Total commander and Quick Access Popup as two well known ones, but two gems that I see are undiscovered are:
- TouchCursor https://martin-stone.github.io/touchcursor/ the only one I found that allows you to use Space as modifier key, and works flawlesly (with other ahk scripts handling hotkeys running simultaneously). Praying it does not stop working with some Win10 update, as it is not being worked one, it seems
Personally I prefer to use left alt key instead of space key, as I can hold down the left alt with minimal effort (right alt takes over the duty of left). For this to cause minimal conflict, I use Sharpkey to remap physical left alt to e.g. F16 at the OS level, then define the desired behavior for F16 in ahk.
- TouchCursor https://martin-stone.github.io/touchcursor/ the only one I found that allows you to use Space as modifier key, and works flawlesly (with other ahk scripts handling hotkeys running simultaneously). Praying it does not stop working with some Win10 update, as it is not being worked one, it seems
- https://github.com/zsims/hunt-and-peck for more mouse free operation of any program.