Vitomu stands for VIdeo TO MUsic converter. It allows easy conversion of online and offline videos to audio files. Just drop a URL or a local video file on the target to start the conversion. The current version supports dropping URL's of Youtube videos, and dropping of local MKV and MP4 files. The output format is currently MP3, but more output options are planned for the next version.
Downloads are available at http://www.digimezzo.com
This software uses code of FFmpeg licensed under the LGPLv2.1 and its source can be downloaded here