Are there any good (free) peices of software for making a music library?

I’m just looking for something to replace Windows Media Player’s Library. The reason is that it has just wiped the names from half of my songs, doubled up albums and changed them to different albums. And yes, I did use the ‘update album info’ option which worked fine for a while but now it’s busted.

Sorry for the mini rant but thankyou to anyone who answers.
Is iTunes free to use even though I don’t use the iTunes store?

Use iTunes, it’s way better and easier.

http://www.apple.com/itunes/overview/

EDIT: Yeah you can just import your songs/cd’s for free.