There are lots of video converters around the web. Most offer a specific format of converted videos. Those that offer multi-formats either have certain limitations or would put watermarks on the output videos. Hamster Video Converter, on the other hand, is a video converter that supports multi-formats, easy to use, and free.
Hamster Video converter supports 40+ formats like 3GP, FLV, MPG, MP4, MP3, DivX, XviD, AVI, etc. It also supports 200+ devices/players for your converted videos. Your output may be played on PSP, PS3, iPod, iPhone, HTC, Nokia, DVD players, etc. All these can be done easily. Just select the file to be converted, select which device you intend the output to play on, and start the conversion.
You may try out and download Hamster Video Converter from the HamsterSoft website.