WavTrim is a simple, easy to use, automatic WAV file cleaner.
WavTrim is useful:

When you extract a track from an Audio-CD (CD ripping).
Before making MP3s (MP3 encoding).
Before making Audio-CDs (CD burning).
WavTrim was originally created because Audio-CD song extraction is not very accurate (you easily get a little bit of the end of the previous track, or of the beginning of the next track). It is possible to trim each track by hand (using a regular WAV editor software), but that´s tedious.

So WavTrim first purpose was to scan and clean WAV files, removing silence and any left over of another track. But WavTrim grew up as a multi-purpose WAV cleaner:

It can normalize the volume (i.e. changes the volume to use full 16-bits dynamic - that can help to get tracks from different sources sound similar).
It can batch-process several WAV files at once.
and more...