An anonymous reader writes "I'm looking to build a family tree for a holiday gift. Do the Slashdotters of the world have any recommendations on open source genealogy software? I did try a 14-day free trial of Ancestry.com. What a scam! I submitted the personal information for my parents, grandparents, and me. Then, I received a pop-up telling me that if I would like to get information on my family, I would have to upgrade my subscription for $29.95 US. So, I took the chance. Turns out that the only information they had was my previous addresses for the past 20 years." The venerable GRAMPS is still actively developed, and its site lists several other possibilities, too. Any favorites, or anti-favorites, out there?