1)   MP3 Key shifter 2.0
MP3 Keyshifter is a breakthrough piece of software that allows you to change the key of any audio track and save the modified song as an MP3 or WAV file. If you use backing tracks you can change the key to suit your voice at the press of a button.

 2)   Riffmaster Pro 3.0.5
RiffmasterPro slow down music software musicians, keeps pitch, learn song easily They Call it The Software revolution that's rocking the Guitar Playing world Instantly Play Any riff of Any Guitar Hero or Monster Player. Riffmasterpro music software.