Programs to burn dvd's on a mac

my friend has a mac, and wants to backup some dvd’s that she has. i have never used a mac beyond just surfing the web. i was wondering what programs does everybody use? free programs are best. is it the same process that one uses on a pc? thanks. im really clueless as to how macs work.

chris

FfmpegX
http://homepage.mac.com/major4/