Most DVD ripping software is not free, some free DVD ripping software is not easy to use, or cann't rip to some formats, such as, Flash video. So, I will recommend everyone a DVD ripping software which is not only free but also easy to use. this free tool is "E.M. Free DVD Copy", it can help you easily rip DVD to many popular formats, such as mp4, 3gp, flv,h264, Xvid, MOV, VOB, Mpeg, Mpeg4, Mpeg TS, AVI, WMV. so you can watch dvd movies on portable players like iPod, iPhone, PSP, Zune, etc.
It is easy to use, just 3 steps to rip DVD movie to iPod.
1.Download "E.M. Free DVD Copy" from:
E.M. Free DVD Copy - Copy DVD to AVI. DVD to iPod(Pro. Version), DVD to iPhone, DVD to WMV, FLV ,MPEG, Copy DVD to hard disk, DVD to WMV
2. run "E.M. Free DVD Copy" in ripping mode:
3. then select iPod profile:
you can also see the steps with following Youtube video:
YouTube - Rip DVD to iPhone 3G, iPod with 3 Steps.