Free full fledged sound editor.

[Yamahaluver]

http://audacity.sourceforge.net/

An excellent full fledged sound editior with fantastic amount of plug-ins and all for free.

 

[zumbo]

Very cool. Thank you!

 

[Yamahaluver]

Make sure to go over the myriads of plug-ins, they are all free and offer massive amounts of features.