#1 A Cement Jointer- also called a sidewalk groover or sidewalk creaser. It smooths the joint between two concrete surfaces.
#2 Stud Finder- no, not THAT kind of stud, the kind that holds up walls.
#3 Pineapple Corer- yes folks, no household should be without one. I own one, thanks to my Mom. It is a great doohickey to get the best part of out of a pineapple!