I quilted a knit/cotton quilt for a friend of mine grandmother I didn't want to do it for I thought the knit would stretch, but it didn't and it came out nicely. She was proud of it. I have a quilt machine on a 14' frame so I had to pin it in and advance the rollers, but worked fine.
My buddy uses knit to make rag rugs, they will never wear out. I think her daughter has a tute on how to make a rag rug.