Yksi chair
Radiolarian sofa
Contraforma Mutabor Stool
Riki Stool
Cardboard chair design competition
Cardboard bed
Cardboard office
Nothing office
Cardboard bookshop
Cardboard tea house
Design Boom Cardboard Chair Competition:
http://www.designboom.com/cardboard.html
http://www.designboom.com/cardboard1.html
http://www.designboom.com/cardboard2.html
http://www.designboom.com/cardboard3.html
Other flat materials folded into chairs:
http://www.designboom.com/london03/29.html
http://www.designboom.com/london03/973.html
http://www.designboom.com/london03/112.html
http://www.designboom.com/london03/385.html