Overall

DVD Squeeze is another step-by-step guide covering several freeware and shareware programs that can be used to copy DVDs. It was originally geared toward making highly compressed copies to a CD, however the new $69 Version 6.0 combo is now bundled with a true DVD to DVD copy program called "Copy DVD to DVD".

Copy DVD to DVD

This is a dvd to dvd copy program however it requires a little more knowledge on the part of the user than most other products. For example, you can compress a DVD-9 movie so it will fit on a DVD-5 blank but you have to choose the compression level yourself (it tells you the expected size at each level and you just pick the one that is small enough to fit).