Boilsoft Audio Converter
converts between different audio formats and extract audio to mp3, wma, wav, ogg
4Easysoft MP4 to MP3 Converter
convert mp4 to mp3 format; convert collection of mp4 movies/music to mp3 audio.
4Media MP4 to MP3 Converter
It converts RM to MP3, MPEG to MP3 and other popular video to audio formats.
4Media MP4 Converter
It can convert AVI, MPEG, DivX, MOV, RM, WMV, 3GP, VOB, VCD, DV to MP4 video.
4Media MP4 Converter for Mac
It can convert video and audio files and support iPod, PSP, Apple TV etc.