If you want a gentle, non-sulfate shampoo, your best bet is probably a health-food-store brand.

One NOT to try is Pave, which is very drying in spite of being non-sulfate. Cream of Nature is one that you might find in the "ethnic" section. If there is an Ulta in your area, the Activate line has a great non-sulfate shampoo and conditioner that is not expensive (about $8 for a 12-ounce bottle).