MP3Gain - A free automatic mp3 volume normalizer.
wxMP3gain - Needs to be compiled.
Sound Normalizer - Sound sound normalizer, designed to enhance or restore the volume of musical WAV and MP3 files.
MP3 Normalizer - Improve the quality of MP3 collections by adjusting volume and applying audio effects.
soundKonverter - soundKonverter is a frontend to various audio converters. The key features are:
MP3Gain Express - MP3Gain Express is a basic port of ...