Daniusoft Super DVD ripper is one of the best DVD ripping software, which can help you rip DVD to almost all video and audio formats, such as convert DVD to AVI, rip DVD to MPEG, WMV, DivX, MP4, H.264/AVC, RM, MOV, M4V, XviD, 3GP, MP3, WMA, WAV, RA, M4A, AAC, AC3, OGG, etc.

DVD Shrink (Windows) 
Despite the fact that the freeware DVD Shrink hasn't been in active development for years, this freeware decrypter, ripper, and compressor is still a favorite all-in-one stop for ripping and backing up DVDs. Its compression feature is what sets DVD Shrink apart, compressing 8GB dual-layer DVDs down to 4GB sizes that will fit on standard, single-layer DVD-Rs (i.e., the type of DVDs most consumers can burn to). It's even inspired us to write our very own DVD Shrink helper application, DVD Rip, which turns the already simple DVD Shrink process into a one-click ripping affair. HandBrake (All Platforms)

The free, cross-platform HandBrake makes ripping DVDs to a bevy of useful, playable file formats a cinch, with support for iPods, PSPs, Apple TVs, PS3s, and pretty much any other format your device requires. It's fast, free, and takes the difficulty out of both ripping and transcoding. DVDFab HD Decrypter.

Much like DVD Shrink, DVDFab HD Decrypter cuts through copy protection and rips DVDs to your hard drive. Unlike DVD Shrink, DVDFab does not offer compression tools. DVDFab is shareware, but its trial version lets you do nearly as much as you'd ever need. That said, users who pony up for the platinum edition don't seem to have any regrets. MacTheRipper (Mac OS X)

Freeware application MacTheRipper breaks copy protection from DVDs and rips the contents to your hard drive—which makes it the go-to Mac version of apps like DVD Shrink or DVDFab. Like the other two, MacTheRipper doesn't encode its rips to other formats (instead it just rips the DVD menu and all to your hard drive), but that's what Handbrake is there for.
DVD Decrypter

The freeware DVD Decrypter works much like DVD Shrink and DVDFab, ripping DVDs to your hard drive by tearing through pesky copy protection. Like DVD Shrink, DVD Decrypter hasn't been actively developed for a while, but it's still doing the job for most folks without complaint.
