DVD Decrypter 3.5.4.0 is a free tool that allows you to decrypt and copy DVDs to your PC's hard disk and is still one of the best free dvd decrypters. From there you can watch them with the likes of WinDVD 8 and Cyberlink Power DVD 7 , you can write them back to DVD-R / DVD-RW / DVD+R / DVD+RW / DVD+R DL / DVD-RAM media or you can convert them to VCD / SVCD / DivX for burning onto CD-R / CD-RW.
DVD Decrypter software can write most types of CD / DVD images via its 'ISO Write' mode, and it supports all the latest writers (including booktype / bitsetting on many of the major ones - i.e. BenQ, LiteOn, NEC, Plextor, Sony). You can even use DVD Decrypter to erase / format your rewritable media!
Advanced functionality can be found in context menus that appear when you right click on various bits of the user interface.