The way the CD rippers get the metdata for the tracks is by searching an online database for the information – iTunes uses the Gracenote database I think – and I don’t know of any software that so this without an internet connection..
An alternative to iTunes as an audio ripper would be AudioGrabber – which is free.
Personally I use iTunes (and I am a Windows user) as it means that I can organise all my music in iTunes and then just Virtual DJ for playing out – as it reads the iTunes databse and shows all my iTunes playlists in VDJ..
There is currently no alternative for that aspect of iTunes (although other software will organise your music, none of them will sync with Serato/Traktor/VDJ/Cross..)
bob6397