Scribus
Scribus is a desktop publishing (DTP) application, released under the GNU General Public License as free software. It is based on the free Qt toolkit, therefore native versions are available for Linux, Unix-like operating systems, Mac OS X, Microsoft Windows, OS/2 and eComStation. It has a number of page layout features and competes with leading commercial applications such as Adobe PageMaker, PagePlus, QuarkXPress or Adobe InDesign.
Read more about Scribus.