Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Spectro - Spectro is a freeware audio file analyzer for windows.
TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.
Friture - Friture is a program designed to analyze audio input in real-time.
Radium - Radium is a music editor with a new type of interface.
Lossless Audio Checker - A utility to check whether an audio file is truly lossless or not.