You can probably use almost any styling product without -cones if you have fine normal porosity hair.

For co-washes, as lizzlebelizzle said, you can use anything. Suave Naturals, VO5, or GVP Conditioning Balm (from Sallys). You can use any of those as a leave-in but since you have fine hair you probably don't need a lot. Then add a gel on top. You can try HETT which a lot of people like, or Giovanni LA style gel. Ecostyler at Sally's might also work escpecially on the humid days. The gel should help to seal your hair and prevent frizz. Lastly, you could probably work in some protein treatments every now and then since you have fine hair that you color treat it. I hope that helps.
~belasuna
3a/b, very dry, fine/med-coarse, high porosity
CG since 7/27/09
Bella Curl Products
CW: protein free-cleansing creme
CO: protein free MRcondish
Styler: FSG + protein free LI Elixir, Gellie, Shine & Seal Serum
Lady of Elixir, Keeper of the Secret Blend, in the Order of the Curly Crusaders