Coconut oil is very good for your hair, but it is best if you try to get raw coconut oil. The processed coconut oil is much cheaper, but it lacks many of the qualities of the raw oil. The raw oil also has a wonderful smell which the refined oil lacks.
In Africa women use shea butter in their hair. Shea butter is also a natural sunscreen so it can help protect your hair from the sun's damaging rays. As with coconut oil, you will want to buy unrefined shea butter as it retains all of its healthful properties. A word of caution about shea butter: Shea butter is from the shea nut so please beware if you have nut allergies.
My friends from Pakistan recommend red sesame oil as a scalp treatment. It is supposed to promote hair regrowth. I tried it for a few months but it didn't seem to work, but it may work for someone else.