I think I have tried everything under the sun, especially when I was transitioning, so here are my MUST HAVES!

Please keep in mind that I do not have a relaxer - I say that because in my experience some products work great on relaxed hair but not unrelaxed hair (lilke my beloved Neutrogena Triple Moisture Serum

)....
Garnier Fructris - I LOVE their 3 Minute Deep Conditioner. I love thier line of conditioners and shampoos too
Dove - Intense Moisture Shampoo and Conditioner. If you hair is dry, BUY THIS PRODUCT. I am so impressed with this...and all for $4 for the big bottle.
Aussie 3 Minute Deep Conditioner with Tea Tree - I believe this is comparable to Biolage Conditioner which I "use" to use. And its $3 a bottle.
Sally's Generic Brand: Joico K-Pak: Yep, it works JUST as good as the original...$4 a bottle
I make my own hair/scalp oils. Right now, my mixture is as follows:
2 part almond oil
1 part avacado oil
1 part coconut oil
few drops of ylang ylang
To be honest, I've seen the most growth with this regime (my hair is mid back length), but take it for what its worth.