Isn't the S&W Shield a 9mm single stack?
Sort of. What I read is that it's shaped so that rounds are slightly staggered in the magazine.
Others that I'm aware of: KT PF9, Ruger LC9, Firestar. Probably the bulk of the current micro-9s are single stack.
"As was the man of dust, so also are those who are of the dust, and as is the man of heaven, so also are those who are of heaven. Just as we have borne the image of the man of dust, we shall also bear the image of the man of heaven. "