The Socialite Skirt DIY no-zipper skirt -- I love this lady, she has so many free tutorials that are easy and yet classy and don't look DIY but professional. I already have a few of her tutorials on my To-Do list.
(other pinner said) Sew this skirt: You'll have a hard time finding anything more comfortable than The Jersey Skirt. It's also one of the easiest skirts to make! This simple sewing project makes for a great skirt for spring and summer.