Designed especially for all iPod/iPhone users:
iPod Video Converter
iPhone Video Converter
DVD to iPod Converter
DVD to iPod Converter

I found the most popular and economic video converters recently. Hope to share with more friends.
MP4 Converter can convert all the mainstream video, like AVI, FLV, WMV to MP4, H.264/MPEG-4 AVC(.mp4), MOV, AVI, and convert audio or take out audio from videos to AAC, AC3, AIFF, AMR, AU, FLAC, MP3, M4A, MP2, OGG, WAV, WMA which is playable on all the MP4 MP3 players, such as iPod, iPhone, PSP, Creative Zen, iRiver PMP, Archos, PS3, Xbox.
AVI Converter can convert any formats like MP4, FLV to AVI, H.264 AVI (.avi), DivX(.avi), XviD(.avi) video, or extract audio from AVI and other video formats to AAC, AC3, MP3, M4A, MP2, WAV audio with super speed and excellent quality.

Those majoy converters are really economice and functional. I hope more friends can eojoy its convenience.
iPhone Ringtone Maker convert MP3 to iPhone, iPhone OS 3.0/3.1 Ringtone, even convert any video/audio to iPhone M4R Ringtone, including 3GP, AVI, MKV, RM, MOV, XviD,MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, WMA, WAV, RA, M4A, MP3 to M4R iPhone ringtone.
Total Video Converter can convert between any video formats including MPG, MPEG, MPEG2, MP4, H.264, SWF, FLV, VOB, MOD, M4V, AVI, WMV, 3GP, 3GPP, MOV, DivX, XviD, QuickTime Video, DV, MJPG, MJPEG, MPV, etc, along with HD videos, like HD TS, HD MPG, HD MPEG, HD MP4, HD AVI, etc and extract audio from these video. It also converts between all audio formats including MP3, MP2, AAC, AC3, WAV, WMA, M4A, RM, RAM, OGG, AU, AIF, AIFF, APE, FLAC, NUT with excellent conversion speed and quality. Then you can easily full enjoy your portable player.
iPod Video Converter convert all video like MPG, MPEG, MPEG2, MTS, M2TS, TS, VOB, MP4, M4V, RM, RMVB, WMV, ASF, etc to MP4, H.264/MPEG-4 AVC(.mp4), MOV format for your iPod, iPod touch, iPod nano, iPhone.

This detailed tutorial is designed to help you get started using 4Videosoft HD Converter Box and 4Videosoft Mac HD Converter to accomplish conversion between almost all popular high definition video for playback on your portable multimedia players such as iPod touch/video/nano/classic, Zune, iPhone, Apple TV, PSP, Xbox 360, PS3, Archos, iRiver PMP Player, Creative Zen, Pocket PC, and Mobile Phone etc.
http://www.squidoo.com/hdconverterbox

MTS file converter full guide for you
http://www.squidoo.com/mts-files

http://www.squidoo.com/dpgconvertersuite
This guide is targeted for people who want to watch their movies on their Nintendo DS.Many people maybe wonder about what is dpg or dpg formats. DPG is a Nintendo DS Movie File. .DPG files stand for Nintendo Dual screen .MPEG video format, which is a kind of MPEG-1 video created by Moonshell for Nintendo Dual Screen. All DPG files contain a 36 byte header, followed by audio, and then a standard mpeg-1 video stream.

Best Video Converter
MTS Converter for Mac
HD Converter