Do you mean software as a means to storing your MP3s as well as maintaining a database of the album titles etc or purely cataloguing what MP3s you have?
Any piece of software that's able to read the ID3 tags of MP3 files should be able to do this for you. As an earlier poster said, iTunes should be able to do this. However, in my opinion, it's rubbish and slow on the PC. Different story on the MAC of course. Just beware that you'll have to tell iTunes in the options not to convert to AAC format (Apple's poor quality default format)