[rc]

The best of the best at lifehacker.

[Jim]

DVD decrypter every time for me unless its a dvd - dvdr copy in which case I use 1click dvd copy

[GCW]

I use DVD Shrink, along with DVD Region and CSS free.  The latter runs in the background as a decoder and I've never found a disc it won't work with.  Plus they are both freeware.