Pinch is the seat that uses a piece of wood, it has a stunning design.
Here some pictures by Matthias Pliessnig:

Source: Contemporist

The Bark seating is Modern Seating Furniture has designed Russian designer Dinar Shamed.

The Bark Seating was designed for two persons who can use it simultaneously. They would each have their own seat and they would also be able to easily chat as they will be facing each other.

Source: contemporist

Modern comfortable seating Spectra by Matti Klenell for Källemo.

This seat looks inviting, you dream of lying down and relaxing on the pillows reading something or looking at the fireplace.  It’s a big seat that has a wooden frame and upholstered solid ash colored cushions. There are 10 pillows in two layers of different texture, density [...]

A singel seat and at the same time a multiple one, evocative yet functional, that can change in different compositions based on the various necessities, forming different drawing and configurations, orderer and disordered but always in harmony with the context.

The Zip-Up Chair is a unique piece of furniture designed by Kim In-bo. The Zip-Up Chair looks like a cross between a sleeping bag and a collapsible chair. Its ultra-portable design makes it perfect for people who are always on-the-go and may just want to take a seat without having to carry around an actual [...]

The most unique concept called ‘Curves’, Darko Nikolic has rightly proved that seating are no more just limited to conventional square shape. Designers are increasingly pulling their inspiration from nontraditional sources, which is leading to bizarre and cool furniture concepts like Curve. give tribute to this design,do you agree.