A simplistic 4x6 photo frame. The photo drops in from the top and the tolerances are well-made so it won't squish the picture, but also won't just fall out. I printed a handful of these when decorating my office at work, and I get comments often on the fact that they're 3D printed!

I know the STL viewer acts odd, but the base is angled 15 degrees from the frame itself, and I normally print it with the base flat on the bed, with no support, and a moderately small layer height so there are no issues printing without support.