iCopy is a free and open source software that lets you combine your scanner and printer into a powerful, yet easy to use photocopier by only pressing a button. Its simple user interface let you manage scanner and printer options, like brightness, contrast, number of copies in a couple of seconds. As it's small and no installation is required, iCopy is perfect for USB pen drives. Version 1.2 adds tooltips, a preview option, and a status bar, along with several minor bug fixes.