KeyFinder is intended to be very focused: no library management, no track suggestions, no media player. Just a fast, efficient workflow tool. The accuracy of the algorithm is pretty good; KeyFinder is in the same league as even the best paid alternatives. I originally developed KeyFinder in 2011 as part of my MSc in Computer Science. The algorithms, design and implementation are described in some detail in my project report, which you can download from my website.
