We've used a similar corner shelving unit to create space in a small 7 by 9 ft room. It's a great, easy shelving solution for small spaces (although installing it was a bit tricky as the walls weren't plumb.
The Kulma shelf, designed by Martina Carpelan and Hong Ngo, is a clever little piece of minimal decor, the beauty of which is in its simplicity. The L-shaped oak shelf is meant to be mounted in a corn (Diy Storage Shelves)
How cool is the Tree Bookcase by Roberto Corazza? This single-cast plastic bookcase is open on both sides allowing it to be attached to a wall or standing freely, leaving access to the books stored on the "branches" of the tree.