Tool that allows you to extract audio from different video formats.

Easily convert your audio files to various formats.
Convert Real Media files to AVI, MPEG-1, MPEG-2, VCD, SVCD and DVD formats.
Efficient Android app to convert and edit audio and video files with support for a wide range of formats.
Free video transcoding software that allows to quickly convert videos into a variety of different formats.

Utility with several resources for audio.