Personal Ancestral File or PAF is a genealogy software from The Church of Jesus Christ of Latter-day Saints or Mormon Church provided freely though their FamilySearch website. It is available as freeware at http://www.familysearch.org/ using the link at the bottom of the page.
After typing names, dates, citations and source documents into the database, PAF allows users to sort and search the genealogical data, print various forms and charts, and share files with others in GEDCOM format. It is also able to link images and other media files to the individual records.
Online Tutorial for Personal Ancestral File (PAF) http://paftutorial.byu.edu/