MP3Gain - A free automatic mp3 volume normalizer.
QMP3Gain - Graphical user interface front end supporting MP3Gain engine which analyzes and losslessly adjusts...
easyMP3Gain - Graphical User Interface (GUI) for MP3Gain, VorbisGain and AACGain (enables you to modify the...
wxMP3gain - Needs to be compiled.
soundKonverter - soundKonverter is a frontend to various audio converters. The key features are:
AACGain - AACGain is a modification to Glen Sawyer's excellent mp3gain program.