Scribus

Scribus is a desktop publishing (DTP) application bringing professional page layout, typesetting, and animated and interactive PDF presentations for newspapers, brochures, etc. The application is designed for beginners without limiting support for professional publishing features such as: spot color support, CMYK color, high grade PDF creation, Encapsulated Postscript import/export and creation of color separations.

Homepage: http://www.scribus.net/