I have something like this in my laundry room for rainy days or extra stuff that won't fit on the two lines outside (small stuff)...
The Invisible Clothesline | Drys Your Clothes Inside and Outside
And one of these, but I use this indoors....
5-line Outdoor Retractable Clothes Dryer
And I have two of these outside and love them...
ClotheslineShop.com: Cord-O-Clip automatic pulley system