1)   3GP To PSP Converter/Splitter 8.4.63
3GP To PSP Converter/Splitter is full featured video converter software for converting 3GP video to Sony PSP Movie and PSP Video format. It all-in-one 3GP to PSP Converter and 3GP to PSP Splitter software, offers fast conversion speed. And the output movie/video supports PSP screen, you can enjoy your favorite movie on your PSP as a MPEG-4 Player. With 3GP To PSP Converter/splitter you can cut any part of 3GP video files to your PSP player...

 2)   AimOne 3GP Cutter & Joiner 1.01
AimOne 3GP Cutter & Joiner is a powerful 3gp edit tool, with it, you can split/cut 3gp video/audio into smaller one without re-encode; also you can join mulitple 3gp video/audio files into one "non-stop" file.