I use vinegar for a few things:
1. I soak a couple of cotten balls in vinegar and keep it in a bowl near the litterbox to get rid of the smell. The vinegar smell is strong for a bit, but it fades and you still don't smell the litterbox.
2. I put about 1/2 cup in my wash to get rid of smells and it works as a fabric softener.
3. It's great for cleanning windows and mirrors.