MP3Gain - A free automatic mp3 volume normalizer.
FLAC - A free, open source codec for lossless audio compression and decompression
QMP3Gain - Graphical user interface front end supporting MP3Gain engine which analyzes and losslessly adjusts...
WavPack - WavPack is a completely open audio compression format providing lossless, high-quality lossy, and a...
easyMP3Gain - Graphical User Interface (GUI) for MP3Gain, VorbisGain and AACGain (enables you to modify the...
LameXP - LameXP is an Audio Encoder Front-End, a graphical user-interface for a number of audio encoders.