Sound Editor 

WavePad is a sound editor program for Mac OS X. This software lets you make and edit voice and other audio recordings. You can cut, copy and paste parts of recording and, if required, add effects like echo, amplification and noise reduction. Soun......

Sound In Depth is a powerful and easy-to-use audio editing and Converting program with multi-language support. Edit your sounds using cut, copy, and paste features (with unlimited undo functionality), mix tracks, or apply effects to your recordings.......

 Sound Editor