Need4 Free 3GP Converter is an all-in-one free 3gp converter that allows to save any unprotected DVD file and video to 3gp with the settings for best preview on your cell phone! Convert dvd, mp4, mpeg, mov, wmv, avi to 3gp. With Need4 Free 3GP Converter you will quickly convert save any part of a longer movie and extract audio and photos to share on your cell phone.
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ABC 3GP/MP4 Converter is a free software for 3GP/3GPP2/MP4 file conversion of portable device. It can convert almost all video formats, for e.g., DivX, XviD, MOV, rm, rmvb, mkv, MPEG, VOB, DVD, WMV, AVI, AVS, ASF, H264, to 3GP/3GPP2/MP4 format for playing on mobile phone, smart phone, PSP, iPod or other portable video device. Its integrated with H.263 codec which has super fast conversion speed with high quality. It can also merge many video clip into one.
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Xillsoft Video Converter Ultimate is also a good tool for all this.