Free, made to do just that.
I have an iPod Touch and I need something to convert DVD's to it, as well as something to convert avi/wmv/mpg to it. My main desire is for the video to not be stretched horizontally or vertically on the iPod, as I have been experiencing, and seriously hate. (If you don't know what I'm talking about, it's when you convert a video and it stretches it so people look way too skinny or way too fat). Thanks!