What are some natural ways to relieve itching on a dog?

Question for you: What are some natural ways to relieve itching on a dog? I know of peppermint oil, tea tree oil, calendula, oatmeal bath, aloe vera, marshmallow, neem, grapefruit seed extract, and flowers of the sulphur. Have also heard of rubbing dry baking soda on to the dogs fur to ease itching and putting some in its dog bed to soak up any unnecessary dampness it may hold. Citronella oil works as a natural insect repellent too. What other suggestions are out there?