I find myself needing to transport heavy stuff to other parts of my property over rough terrain. A lot of the heavy stuff already has wheels on it, but they are not suitable for transport over rough ground. Think portable compressor, power washer, welder, generator, large rolling tool boxes, portable table saw, and the like.
Imagine something that looks like a hand truck but instead of wheels it has a mating extension for a trailer hitch. And it has a very large base plate and convenient, padded back support for strapping things to it. The trailer hitch it will use has the ability to lift, such as the one on a Heavy Hitch on the 3-point hitch of a tractor. With a base plate like a hand truck, heavy stuff can be easily rolled onto it. In my view, this makes it much more useful for my purposes than fork lift tines or a carry-all. I don't want to have to lift stuff up initially in order to carry it. And then there's the getting it back down part as well.
I put my thoughts on the attached drawing, dimensioned to meet most of my needs. I'm not an artist at all. I'd have liked to post an angled perspective view of this thing, but I'm not that talented. With a little imagination, I think you'll get the idea. Would these dimensions work for you? If you have a front loader, you may have no use for this at all. But I think a product like this would provide some of the solutions of a front loader at a small fraction of the price.
Would you want one of these for your tractor? How would you modify the design to meet all of your needs?
I also have a version of this product in my mind with a hydraulic or linear actuator lift mechanism. This would get the lift height to be sufficient to get heavy stuff in and out of a pickup bed. Does that interest you?