Designed by Bjorn Bye, the Hook concept is a credit card-sized piece of plastic which folds in a Z-shape to fit between door and frame. When temporarily installed it acts as a hook, sturdy enough to hang 11 pounds of clothes and whatever other crap you have.

Measuring 54 x 84 x 1.5mm, it's designed to slide into your wallet so you can easily carry it with you. If you're interested, the project is currently seeking funding on Indigogo. [Hook]