Clothes Dryers use 5 - 10% of residential energy use. Taking the time to hang wet clothes outside can be enjoyable, good for the environment, naturally remove stains, and leave a pleasing scent in the clothing.
Don Laughlin described the clothesline as a "linear solar fabric dehydrator in the backyard."
Also, there is an advocacy organization called Project Laundry List at laundrylist.org.
We just use a very simple line made of rope hung between trees. Nothing fancy here!