LameXP - LameXP is an Audio Encoder Front-End, a graphical user-interface for a number of audio encoders.
MP3Gain - A free automatic mp3 volume normalizer.
SoundConverter - The sound conversion application for the GNOME environment.
QMP3Gain - Graphical user interface front end supporting MP3Gain engine which analyzes and losslessly adjusts...
Multi frontend - Multi frontend is a Windows GUI (grafical user interface) for the following console audio...
wxMP3gain - Needs to be compiled.