Scribus is an open-source program that brings professional page layout to Linux/Unix, MacOS X, OS/2 and Windows.
It is powerful software that helps you create great looking documents of all kinds. It also comes with a lot of support options to help you achieve the best result. There is an enthusiastic and friendly community around Scribus that assists beginner and pro alike through the mailing list, IRC channel, wiki, contracted support, and the bugtracker.
Scribus supports professional features, such as CMYK color, spot color, separations, ICC color and robust commercial grade PDF.