this can be downloaded and run directly
Free professional video converter Windows|Mac|Linux
Extract YouTube Videos to Audio Mp3/Wav/Aac or Video Mp4 Files Easy!
tools for the floppy format of the Sequential Prophet 2000/2002
Command-line mass conversion of any directory tree of audio files.
A front-end for audio conversion
Convert Ensoniq .ECW files to .SFZ
Mp3 decoder to convert mp3 files into wav on Linux, Windows, Android
Automating Powerpoint WAV Narration conversion to MP3 Narration