Last time I bought some, Garnier Fructis Body Boost was protein free. It's decently moisturizing without being heavy. Slip is good too. I usually need protein, so this isn't my daily conditioner, but when I need a little moisture, this works for me as both rinse out and leave in.

If you're ok with perhaps needing an occasional low poo (it has amodimethicone in it) and your hair tolerates a fair amount of oils in a product, Renpure's Argan Oil Luxurious Conditioner is great. It's protein and glycerin free, and the only humectant I see in the currently posted ingredients list is sorbitol, which is low on the list. The higher amounts of oil in it should help lessen the effect of the sorbitol too.

I have the old formula, which was cone free. It's too much moisture for a daily rinse out for me, but if I need a lot of moisture, I grab this. It's also my go to leave in for low dews. I get great curl formation, even without a gel.
CG since 11/2011
2c /3a F /Mii, low porosity

Go To Products /Routine:
Clarifying: Suave Essentials Strawberry
Low Poo: Renpure Luxurious Argan Oil
CO: Suave Essentials Strawberry, V05 Kiwi Lime
RO /LI: Tresemme Perfectly (un)Done, Cure Care, V05 Kiwi Lime Squeeze, Suave Essentials Strawberry, Renpure Brazilian Keratin (old formula)
Stylers: LALSG, AIF, HETT, Suave Professionals Firm Control
PT: IAGirl's as needed