Library may not be the right term.
Try looking for Catalog utilities. I can't help you specifically as I was asked to create a catalog of a friend's music library, and in the end had to resort to a spreadsheet file, but it was less than satisfactory.
I have a large (30k+) music library, and I like to browse my music. But I'm really sick of the iTunes style layout, where every single track is displayed with one long scroll bar.
I used to use a program called MusicMatch where I could display only the artist, and then expand all of that artist's songs in the main browser. In fact, I could do this with just the arrow keys (up & down, and then left & right to expand & collapse, like in Windows Explorer) and Enter to add a song to my playlist. Sadly, MusicMatch got bought by Yahoo, neutered, and then ignored.
I've looked at TONS of different music programs, including WinAMP and Songbird and so many others, but I can't find anything that lets me actually browse my music.
Can anybody help?
(p.s.: I am also open to suggestions for plugins that would allow me to get the library style I'm looking for)