Followers of the Breffo Spiderpodium accessory should now be happy because it is available for tablet devices. Once you clamp the stand around your tablet, it can rest at an angle anywhere between 0 and 90 degrees, giving you a fully-customizable viewing angle.
You can even use the claws to attach the Spiderpodium to non-flat surfaces. The price tag is $35. Where can you attach this one? Many places. Desk, lap, bed, car, plane, hotel, camping, hanging, sideways, upright, oddways, bendy, flexible, compact, lightweight. I guess the answer is just about anywhere.