Some smallish groups of Christians, too, formally deny free will, and embrace the consequence that there is no moral responsibility, no personal “ownership” of any act. Thus there can be no praise or merit in a good act, nor really blame for a bad one, since it was predestined by a deity who has (so they say) the only real will, and sovereignly wills all things as they are.
I heard Harold Camping almost go down that road.