My favorite leave in is It's A 10 Miracle Leave In. It's pricey, but it's the best leave in I have found thus far. Plus it helps with strengthening my hair as well.

I do also own Giovanni Direct Leave In as well. As that's what I had been using on and off before purchasing It's A10. I still do use it sometimes. It's an all natural product made with a lot of organic ingredients with in it. And, with this product a little bit really does go a long way.
3B, low density, high porosity hair

Shea Moisture Curl & Shine Shampoo
Shea Moisture Curl & Shine Conditioner
Carol's Daughter Hair Milk Cleansing Conditioner
Carol's Daughter Hair Milk Original Leave-In Moisturizer
Carol's Daughter Hair Milk Refresher Spray
Marula Oil
Argan Oil
Oyin Handmade Hair Dew
Camille Rose Naturals Curl Maker
Camille Rose Naturals Curlaide Moisture Butter
Camille Rose Naturals Almond Jai Twisting Butter