Check out Scribus!
Scribus is an Open Source program that brings professional Layout to Linux/UNIX, Mac OS, OS/2 Warp 4/eCom Station and Windows desktop with a combination of press-ready output and new approaches to page design.
Underneath a modern and user-friendly interface, Scribus supports professional publishing features, such as color separations, CMYK and Spot Color support, ICC color management, and versatile PDF creation.
Check out Gimp!
GIMP is an acronym for GNU Image Manipulation Program. It is a freely distributed program for tasks such as photo retouching, image composition and image authoring.
It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.