I use Cucusoft Ultimate Converter Suite. It gives you options to convert DVD formats as well as mkv,avi,mov, etc. The best thing about it is that there is an option to make the converted files small. (extratorrent.com)
Haha, I started to answer this, realizing I had answered it earlier in this thread. The same questions get asked over and over again without people searching first, so I figured this was one of those instances. Ooops, my bad. Couldn't delete, so I vented instead.