aTunes

aTunes is a simple application specially designed for anyone who has thousands and thousands of songs in MP3 format.

The creators of aTunes have used an application with a similar name (iTunes) to create a program that is free, open-source, and programmed in Java.

To start using the program, you just have to select the folder where you keep your MP3 files, and the program will take care of organizing those files into folders within your new music library.

And don't worry about having to deal with any external applications: aTunes includes an effective player that supports playlists and ID3v1 and v2 tags.