Hello friends, I searched the Internet for a decent video converter that converted 3gp video from my mobile to wmv, mpg or any other common and easily playable format. I tried several of them but the winner was Format Factory as it converted / transcoded my video easily with no anomaly in playback speed, quality etc. I would recommend Format Factory to you people as it helped me a lot and I researched the web and found out that it is very trusted and reliable converter of all the free video converters available. It works equally well for other formats including mp4, mkv, wmv, avi, xvid and others.

Format Factory(Highly Recommended)

This full-featured converter allows conversion to and from popular formats including video formats for PSP, iPhone, and other video formats. The conversion options are easy to find within the interface and you can even perform batch conversion options for mobile video, pictures, audio, DVD videos, and more.it also joins files including FLV files (can UNBELIEVABLY trim and join the FLV files)

Others  in the category are

Quick Media Converter

Super Video Converter

Any Video Converter

MediaCoder

MultiPlatform Video Converter ( Linux – Mac – Windows ) – HandBrake

I also found that there is this cross-platform video converter but it turned out to be of no use for me, even then you can give it a try , it’s name is  HandBrake and It’s a multi-platform open-source, portable, freeware application .

Hope this list helped you out with your video conversion needs, I still go with Format Factory ( Easy to use and Best )