FreeMake.com gives us two amazing converter programs for free; one for audio and one for video.
I personally use both of these converters and love how easy it is to use them.
Don’t wast your time buy some fancy program that costs $50-$100 or more when this is available for free.
Converts audio to and from: MP3, WMA, WAV, FLAC, AAC, M4A, OGG
Converts video to and from: AVI, MP4, WMV, MKV, FLV, 3GP, MPEG, DVD, Blu-ray, MP3