Do you need to work with PDFs?
Foxit Reader 4.0
http://www.foxitsoftware.com/
Designed as a free alternative to other proprietary software programs, Foxit Reader allows users to view, modify, and print Portable Document Format (PDF) documents. Visitors will find helpful support documents, along with the ability to mark-up text, replace text, and also insert images and drawings. This version is compatible with computers running Windows XP, Vista, and 7.
From The Scout Report, Copyright Internet Scout Project 1994-2010. http://scout.wisc.edu/