Wondershare DVD Ripper Platinum is the best DVD Ripper software. It is capable of ripping DVD movies to almost all popular video and audio formats with excellent quality and super fast DVD Ripping speed. This powefull DVD Ripper software supports almost all portable video/audio players. It lets you easily rip DVD to iPod, Zune, iPhone, Apple TV, PSP, Xbox 360, PS3, Archos, iRiver PMP Player, Creative Zen, PMP, MP4/MP3 Player, Smart Phone, Pocket PC, PDA, Mobile Phone and so on.
I personally like DVD Shrink, it is also free.