With so many different file formats out there, an effective file
conversion tool is an essential these days.

FormatFactory is a free, fully-featured, converter that enables you
to convert audio, video, and even images, between the most popular
formats. These include WMV, AVI, MPG, MP3, WMA, AAC, JPG, PNG, GIF, and
many more. Better still, FormatFactory supports media formats used by
most major portable devices, including PSP and iPhone.

FormatFactory is very easy to use, although it does have rather an
unintuitive interface. The file browser doesn't appear until you select
the target format, which is a bit weird but as long as you know this
first it's no problem. You can select individual files to convert, or
complete folders, and also tweak some basic conversion settings.

FormatFactory isn't particularly original but what makes it really
useful is that it handles images as well as audio and video. Most
converters like this only handle audio and video, and adding images to
the mix gives it an edge, especially considering it's free. I also like
the Audio Joiner, which allows you to take two separate clips, join them
together and then convert them. It would have been nice to have had
preset profiles for mobile conversions but you can't have it all in a
free app sometimes.

FormatFactory is an excellent conversion tool for anyone that
converts between video, audio and images on a regular basis.