Cool Edit Pro

• http://www.syntrillium.com

Ultimate Sound Factory for a Power Spectrun

• http://home.worldnet.fr/~jyves/

Spanform for a Spectragram

• http://php.indiana.edu/%7Ejhallida/

Analysis and Fourier Analysis

• http://www.clab.unibe.ch/overtone/

WaveAspects

• http://www.clab.unibe.ch/physim/index.htm