Well, I was looking for such a tool at a local garden center and wandered into a pet section (I didn't even know they had one) and my eyes lit upon a tool -- a sturdy flat metal loop, jagged on one edge, smooth on the other with a short handle. it was $7 so I bought it.I'm also thinking I'd like a short handled one, but might opt for a circle hoe. I do have a Japanese offset hoe that is really great.
-- the thing is all of these are designed to be used at a certain angle on weeds that are away from you.
I'm needing another kind that would work on ground right near me when I DON'T want to uproot them -- I think collinear hoe is designed to be used upright (I.e. immediately beneath where you are standing)
I took it on a test drive yesterday and today and it works GREAT!
The flat loop allows you to reach between plants without hurting them and even "lasso" weeds growing close to your plants, jagged edge can be used to pull/tear off weeds at ground level. The flat edge, though not sharpened like a knife, is thin enough, sturdy enough, machined edge corners sharp enough to skim just below the soil surface just like scuffle hoe, and it's very effective for the areas right beneath you since at that point, you're holding the flat blade of the loop parallel to the ground so just the top curve is "hoeing" the ground .
I found it also useful for creating little furrows, sowing seeds, and then pushing and pulling loose soil over the seeds.
For some reason, I can't copy links at the moment on my iPad, but it's called a "shedding blade" and the one I got is for large dogs or horses.