Ferocious Pursuit

I collect guitars and "attempt" to play as well as I could.  More often than not, I hear a guitar riff and wish I could learn the lick on my own as many transcriptions are wrong or doesn't exist.  There have been some tools that help do this by slowing down the song while offering pitch/speed control.

Capo is another product that falls in this category but it is awesome in that it is just damn simple to use.  The user interface is very clean and looks great as a native Mac application.  The introductory price of $39 is a bit high to me but I bought it nonetheless and love it.  Try it!