1)   OJOsoft 3GP Converter 2.7.4
It can convert into 3GP/3G2 video playable on mobile phones from most popular video formats including AVI, MPEG, WMV, MP4, MPG, DivX, MOV, QT, FLV, DVD(VOB), Xvid, MKV, TS, M4V, ASF etc, and also convert into 3GP/3G2 audio from your favorite video

 2)   RER 3GP Converter 3.7.4
RER 3GP Converter is a powerful video converter that can convert all popular video to 3GP/3GPP/3G2/3GP2 video. A professional mobile phone tool 100% supported by Motorola, Nokia or other software 3GP players.