Scribus is an open source application. It is lincensed under GNU general public license. This application has a lot of features and is completely free. It is a page layout app with “press ready” output. You can compare Scribus to Adobe Pagemaker, Quarkexpress or Adobe InDesign. It is a good application if you want to create newspapers, brochures, books, posters, pamphlets and newsletters. Scribus has support for PDF’s, CMYK colours, seperations, major image formats and others. If you would like to get into publishing your own print than Scribus is something you should download.
Here is their website.