Thanks for replies.
Find another good use for it yesterday: placing circle for drilling in center of dxf circle, which imported
as a lot of tiny segments.
I can use that one, definitely. Thanks for your effort..
Soon as I figure how to it..

Just select some objects and click icons - it will come :-)
I'll have a look when time permit. (maybe with another background color than green ? ... any advice ?)
A suggestion ; maybe also add a "to origin" in the list to use the center of the cross as reference ?
Added 'to origin' (it was easy), covers some usecases of built-in Align.
Will release it with the icons then.
I think another shade of green would be ok, to signal "it's for drawing, but not a drawing tool".