Build a chunky modern farmhouse desk using the free downloadable plans available at the link. Great for a small space too without taking up too much room.
If you need to take a seat in the shower, you could always build a wooden shower stool. At the link you can download the free plans to build your own stool.
At the link you can download the free plans to build a modern bench with an angled base. you can modify the length to suit your space.