For years, I've used a lot of different knives for skiving, never being completely satisfied with any of them. In the following photo, mostly the round knife and the one to the right of it have been pretty much my go-to knives for the job.
Today I made one to use just for skiving. The material used was piece of a circular saw blade left over from when I made my round knife. I shaped it with a peanut grinder and roughed in the edge with my 90 RPM water bath knife grinder. It throws water all over the place but it works great. At first I made it with a straight cutting edge but it was not very good. The center of the cutting edge wouldn't cut completely through a piece of leather without the point or heel digging into the work bench. I put a curve to the edge and it works much better. It's only ground from one side so I can get down low with it if needed. I'll try it for a while and if it works good, I'll fashion some kind of handle on it. The hardest thing is going to be protecting the edge when it's in the toolbox. Maybe I can find something to cover just the cutting edge or something.
I see Osborne has a couple different knives that would work but I didn't want to wait for one to arrive and this scrap of saw blade has been getting in the way for a few years. It was a good excuse to get a knife and get rid of an eyesore hanging from a beam in the garage.
So the question comes to mind, what do all of you use for skiving?