I used to use Aubrey Organics Earth Aware Cleanser for laundry because it's 100% natural and cheap at 12.5 cents per load. Then Aubrey stopped making it :(. Then I started using Seventh Generation at 18 cents per load (100 oz container).
I'm really excited about going down to 1 cent with a 100% natural detergent!
6 cups water
1/2 cup washing soda
1/2 cup borax