The links below are to FREE genealogy programs that I actually use and can therefore vouch for their usefulness (to me anyway)

Lets you see GEDCOM files as 'graphical' family trees. I personally could not do without this so useful program.
Click here to see a small example

Personal Ancestral File 4.0 is a new Windows® based version of one of the most widely-used genealogical management programs for home computers. The popular new software program can be downloaded free of charge via the Internet. PAF 4.0 does not provide genealogical data. Instead, its program helps users organize their family history records. It can produce, in automated or manual form, records for personal family histories or charts and logs to help users in their search for missing ancestors