1)   Pb Vocoder 1.0
Pb Vocoder is a software application that can make a human voice sound like a singing synthesizer, a robot, a demon, and everything in between. All in a simple to use, lightweight package! Renders audio to disk, or directly to your soundcard.

 2)   ALO Audio Media Editor 3.1
ALO Audio Editor is a perfect audio editor tool for your music production that supports many popular audio formats. ALO Audio Editor provides cool and easy-to-use interface that allow you to edit an audio file visually.