I am a Mac user and i have bunches of DVD movies and home-made DVD videos, sometimes i break my DVD disc and it is really bad. Now i found a really powerful and easy to use DVD Copy for Mac. it can help me to copy my DVD movies to another DVD disc and when i want to watch my dvd or borrow to friends i can use the copy one not the original. it is really nice that i can protect my DVD movie from being destroyed.
it can copy DVD-5(holds 4.7 G) to DVD-5, copy DVD-9 (holds 8.5 G) to DVD-9, or compress DVD-9 to DVD-5. This Mac DVD Copy software also provides you to Copy DVD successively, select what you want subtitle, audio tracks, include the DVD Menus or remove it to your own defined DVD, or edit your DVD volume.

if you do not want to copy the DVD disc, you can also use this DVD Ripper for Mac to convert your DVD movies to normal video format that can be played on your Mac, such as AVI, MP4, MOV, MKV, WMV, DivX, XviD, MPEG-1/2, 3GP, 3G2, VOB… video formats, and MP3, AAC, AC3… audio formats on Mac.
it is really fast and with high output quality. it can also do many video editing works, such as trim, crop, merge and snapshot, effect, etc.

When you have many video with different video formats, it is really unconvenient. here i know a really powerful video converter for Mac that will help you to convert your videos to the video format you want on your Mac.it can convert your videos to AVI, MP4, MOV, MKV, WMV, DivX, XviD, MPEG-1/2, 3GP, 3G2, VOB and HD Video (TS, MTS, M2TS), MP3, AAC, and AC3 Audio etc. In addition, the best video converter for Mac can also extract audio from video file and convert video to MP3, AC3, and AAC…as you want.

I own ipod and iphone, and I feel it's so inconvenient because I have to use itunes to enjoy them.
While Now I'm using Aiseesoft iPhone transfer and iPod transfer instead of itunes.
These software can import video, audio, photo files or folders, photos from PC to iPod without iTunes, backup files from iPod to PC, even transfer DVDs, any videos, any audios to iPod, then output those files to iPod directly, make iPhone ringtone as well

Nexus One Video Converter is the most excellent video conversion software for Nexus One. This magic video converter allows you to convert nearly all popular video formats, such as HD videos, SWF, FLV, VOB, MOD, MP4, H.264, M4V, AVI, WMV, 3GP, 3GPP, MOV, DivX, XviD, QuickTime Video, DV, MJPG, MJPEG, MPV, MPEG, MPEG2, MPG, etc. to formats(MP4, 3GP, AVC, AVI, MPEG-4, etc.) supported by Nexus One. Also with Aiseesoft Nexus One Converter, you can conveniently extract your favorite audio from any video and convert it to Nexus One MP3, AAC+, Ogg Vorbis, WAV, MIDI, etc.

Make my own ringtone for my iPhone i use Aiseesoft iPhone Ringtone Maker

if you are a Mac user:
try this iPhone Ringtone Maker for Mac

I know a really nice Total video converter. it can convert almost all popular video format. it can also a TS Converter that can compress HD video to standard video mp4 video to put on iPod, iPhone, Archos, PSP and other portable devices. it also has powerful video editing functions, such as effect, trim, crop, and so on.
i found a really nice M2TS Converter. it is really powerful that can convert M2TS to AVI, MP4, WMV, 3GP and all the popular video formats. It also natively supports converting MTS, TS, TOD, MOD and more.

Most people has the habit of collecting DVD movies, however, the disc is really easy to be broken. it is really hard to protect them. So i backup my DVD collection on my computer. i watch the movies whenever i want. i use this DVD Ripper to help me.
it can convert dvd to any video format you want, such as: mp4, wmv, avi, mov, mkv, flv, 3gp and so on. Here i also recommend you a really powerful Total Video Converter. it can convert all videos to different formats.