You mean stuff like a straight blade, either unaltered or with home made "wings" and concrete blocks stacked up on it? There's always the wood or metal square frames that we build and drag behind the tractors... Harrows, also good choices...
Actually, I've been asked to think about good ways to smooth out areas that we box blade at work. We're going for a surface that won't develop any (or as few as possible) ruts and bumps, and trying to do it without spending too much time painstakingly floating the box in all directions.
Dragging a pipe or railroad tie... Dragging a railroad rail was suggested by someone...