Origami
Peter Engel, who is a well-known paperfolder, says "the best paper [for origami] is thin and crisp and absolutely square."  Pre-cut origami paper is sold in many colors, sizes, and patterns. Duo paper, or paper with different colors on each side, is used by paperfolders because it makes areas of different color on the finished model. There are also special papers, like textured, metallic, and patterned.