Anvsoft Video to 3GP Converter transfers your digital camcorder tapes and various video files into high-quality movie playable on cellular phone. It is a video editing and 3GP/MP4 video file converting software. With ANVSOFT Video to 3GP Converter, you can capture video clips from your camcorder, add various video files, edit your home movies right [...]

Official Website: http://www.forum.nokia.com/main/0,,034-63,00.html
Nokia Multimedia Converter Pro
Nokia Multimedia Converter Pro 2.0
Nokia Multimedia Converter 2.0, including an enhanced user interface and support for 128 kbps video bit stream, is a tool for converting common multimedia files (such as AVI, WAV, MPEG, and MP3) into standard 3GPP/AMR, H.263, wideband-, and narrow-band-AMR-supported formats for use in mobile phone applications [...]

Official Website: http://www.xilisoft.com/3gp-video-converter.html
Xilisoft 3GP Video Converter
Xilisoft 3GP Video Converter 2.1
The 3GP converter allows users to convert AVI to 3GP, MPEG to 3GP. The 3GP Converter supports almost all popular video formats including mpeg1, mpeg2, mpeg4, wmv, mp4, 3gp, mov, rm, dv, yuv, h264 to 3GP file conversion.
Xilisoft 3GP Video Converter also convert 3GP video file [...]

Official Website: http://www.imtoo.com/3gp-video-converter.html
ImTOO 3GP Video Converter
ImTOO 3GP Video Converter 2.1
The 3GP video converter is a powerful 3GP converter which can convert AVI to 3GP, MPEG to 3GP. ImTOO 3GP Converter can also convert RM, MP4, MOV, WMV, MPEG, AVI to 3GP file or convert 3GP video clip to AVI and MPEG. You can use [...]