Folder

(n.) One who, or that which, folds; esp., a flat, knifelike instrument used for folding paper.

Thesaurus Entries

book end, book support, book table, book tray, book truck, bookcase, bookholder, booklet, bookrack, bookrest, bookshelf, bookstack, bookstand, brochure, chapbook, circular, comic book, folio, leaflet, pamphlet, portfolio, revolving bookcase, stack, tract