Living Cubes and Resource Tower from Nomadic Furniture vol.1 (this looks like it would be fun for a kid. bed above closet below.)
House In Estoril / Frederico Valsassina Arquitectos
(PAIGE) Metal can also act as an alternative to glass. This barricade on the stair case is both functional and easier to clean rather than glass. It also gives a new look to the interior making it look more industrial.