LapWorks Silicone Handle iPad Grip for iPad 1, 2, 3 & 4 With Ergonomic Grip for improved Hand Flexibility and Comfort
I hate how much my iPad weighs, and all the covers, protecters and handles just make it worse.  This weighs next to nothing, works with either hand and gives me a variety of ways to hold the iPad: hand slid under one or more of the straps, grabbing the straps like a handle, in any orientation. It even works with my Logitech keyboard/cover, albeit a tad less secure. More versatile than most anything else I've seen.