I love natural products and have been using them since I started taking care of my hair last year. My hair is kinky coily and I would say I'm a 4ab mix.
Water: Don't underestimate the power of water. First make sure you don't have hard water. After that, use it to your heart's content. I rinse almost everyday with plain water and it keeps my hair moisturized. I love it. I don't need any of the typical "moisturizers" becuse water does the job.
Coconut oil: Amazing for detangling on wet hair. One of the few oils that can actually penetrate the hair's cortex and provides nourishment to the strand. It also helps slow protein loss from the hair and decreases the damage caused by combing while wet. I use it for detangling, twisting my hair up, and as an overnight conditioner.
Great info about coconut oil, along with other stuff, at
this blog.
Castor oil: Thick oil, great for protecting the hair and "sealing". I use this on my wash and go puff/fro and it keeps my hair moist all day. I've found that using castor oil on wet hair stops the water from evaporating too quickly. It also makes my hair shine.
Baking soda: A little bit mixed with water is great for clarifying and cleaning the scalp and hair. Just make sure to dilute and don't over do it. I only do it once a month, if necessary. I've also used a bit of baking soda mixed with conditioner to cowash, which leaves my hair clean and moisturized at the same time.
Oyin Honey Hemp Conditioner (oyinhandmade.com): I love this conditioner. It's my favorite and I'm about to add it back to my regimen. I only stopped using it because I was doing a whole 100% natural/edible thing for a while. Anyway, Oyin is great and it's almost 100% natural. Perfect amount of moisture for me and it can be used as a rinse out conditioner, a leave-in, and a DC. It also helps detangle really well. And it smells yummy!
Giovanni Smooth as Silk Conditioner (can be found at Whole Foods): My second favorite conditioner. It does have some ingredients I don't like but it has no sulfates, parabens, silicones, or anything like that. In the past I used it as a DC and it's great for that. I love the way it conditions my hair. I'm probably going to start back using it soon.
Here's another thread about natural products that may help you:
Natural/Organic Users Post Your Staples and Reviews