Denzo Guitar Software III: The Guitar Tool will interest especially the guitarists. In fact, it is a suite of several necessary tools. First, it provides harmony tools to learn more than 100 scales and 70 chords, etc. Then, it can also find chord inversions. Finally, it also includes several tools like a tuner and much more to help the musician to be more successful. Its handling requires some effort and its GUI is not clear but all that does not diminish the pleasure to use it.