Jajuk is a full-featured application developed under Java which you will be able to access your songs sorted by categories with.
Jajuk supports MP3, WAV, OGG and AU and among its features, it includes a useful player for playing your files directly from the program.
If you want to start cataloging your files, you will have no problem, you will only have to choose the folder or drive where the files are and Jajuk will create the database. And if you find any mistake, you’ll be able to modify them with just one click.
It also allows you to create playlists, add covers directly from internet and create statistics about the collection.
Without any doubt it is a very good choice and it is free.