I’m a sucker and used to get suckered in to a lot of absolutely worthless yard /garden/and home improvement gimmick tools regularly. I am older and smarter now and do not fall into as many traps as I used to. Does anybody still have the walls o water tomato things? The topsy turvy? Already mentioned are the garden weasel, and the garden claw, I have had every thing that I have mentioned and never ever use any of them after the first use. Not that they don’t have a use just not for me. Two years ago I picked up an earth way seeder from market place and I really really like it. I have had to modify the plates slightly for some seed but for medium to large seeds there is no faster way to get planted. I tried using it for seeding carrots and it was a total disaster, I don’t think there is an easy way to plant carrot seed. I have started using pelleted seed and it cuts way back on the back breaking job of thinning. I may be able to think up several more examples but these are a few.
P.S I know some of us still probably use these items and they work for your situation or soil type they are just not for me.