This is one that I just recently read: a study was done testing different home remedies used to get rid of toe nail fungus. They found that applying Vicks Vapor Rub to your toe nails several times a day was an effective treatment for fungus and that it worked better than some medicines sold as fungicides.
They recommended wiping the nails with vinegar, drying them, and then applying the Vicks. I would suggest wearing some socks as the Vicks is very greasy.
It's nice to know that these affordable treatments are available to us and that they are actually very effective.