Like Brave said, other than Tropical Coconut, all the Suave Naturals conditioners are protein free. VO5's Tea Therapy line is protein free, as are the Free Me Freesia, Sun-Kissed Raspberry, and Pomegranate and Grapeseed conditioners. VO5's Moisture Milks and Silky Experiences lines both have protein, as do the Kiwi Lime Squeeze and Shea Cashmere conditioners. Garnier Fructis's Pure Clean conditioner is also protein free, but it's also heavier than Suave or VO5 so it might be too much moisture for your scalp.
CG since 11/2011
2c /3a F /Mii, low porosity

Spring Products /Routine:
Clarifying: Herbal Essences Tealightfully Clean
Low Poo: Renpure Luxurious Argan Oil
Co-washes: Suave Naturals Tropical Coconut or Daily Clarifying
RO:
Tresemme Expert Selection Perfectly (un)Done, Cure Care, Suave Tropical Coconut or Daily Clarifying
LI (if needed):V05 Kiwi Lime Squeeze, V05 Strawbery
Renpure Brazilian Keratin Straightening (old formula), Cure Care
Stylers: LALSG
PT: IAGirl's as needed