Yes, as geno points out, the only free one that is updated on a semi-regular basis these days is DVDFab HD Decrypter, which is the free section within DVDFab. It will continue to function as a decryption/ripping program even after the trial for the main part of DVDFab expires.
It wll not be updated as soon as the paid version, but lags behind it about 30-60 days.
The only other free decrypter that is even close to being up to date is DVD43. I don't really recommend it though.