patandchickens
Crazy Cat Lady
There are like a million (well maybe sixNeko-chan said:Cloth diapers too. Do you have a pattern for cloth diapers

However if you knit, you could try finding a pattern for wool soakers instead, a lot of people seem to look for them and they are VERY hard to find. They could be knit in interesting colors/stripes/etc I suppose. Although I think I am mentally drifting off into "things you could sell" from your original intention of "things you might use yourself" and I have no idea if you personally would USE cloth diapers (and if so, what style) or wool soaker pants

Pat