The Organix shampoos are sulfate free and could be a nice alternative to sulfate shampoo, but the conditioners do have cones. For co-washing I prefer lighter conditioners (my personal favorite is VO5 Vanilla Min Tea). Make sure you massage your scalp well when co-washing and continue massaging while you rinse. Nature's Gate has some nice cone-free conditioners that work well for rinse-out and/or leave-in. If you consider the VO5 too commercialized, I've heard that Giovani's TTT conditioner works well as a co-wash.

3a/f/iii
Modified CG since 11/5/11
CLEANSE: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo, CHS Treatment Shampoo
RO: DevaCare One Condition, SS Caitlin's Conditioner, Mop Top Daily Conditioner
LI: SS Repairing Protein Treatment, CHS Silk Leave-In
STYLE: Re:Coil, Curl Keeper, Deva Ultra Defining Gel, Curls Rock Amplifier and Strong Hold Mousse, Sweet Curls Elixirs Okra Gel and Hard Hold Gel, SS Curl Enhancing Jelly and Firm Hold Gel