I really liked the Small Easel from kristof65, the lines and creative shape are very nice. However, the slot was too narrow for my needs and as I put taller things in it such as a Kindle or iPad it quickly became too tippy for it's size. In the process of modifying it I removed some excess material, improved rear stability, and made it taller. Now it can support quite a variety of items from photos, cards, iPads, iPhones even with thick cases on them. Check it out and see what you think.

Print with at least 3 walls and 25% infill. No supports should be necessary on modern 3D printers.