The final HE laundry detergent on our list is from Seventh Generation. It comes in a powder only and is made from plant-derived cleaning agents and enzymes. If you like to keep your household cleaners "green," Seventh Generation is a good choice. It's pricey, though, at approximately $0.36 per load.
You can't use traditional detergent in an HE washing machine, but you can use HE detergent in a traditional washing machine. Most HE detergent is concentrated, so it might even save you some money. Just don't forget that it's low-sudsing. Your clothes will still get clean, but they may not have as much fragrance as you're used to.
For more on laundry and appliances, check out the links on the next page.