what is the best way to tag all my mp3 in my collection using ID3 tagging without having to pay for a musicmatch key or something like that?
Here is a couple of free programs which allows you to play around with id3 tags... The GodFather as reviewed on TechTv... If neither of these are to your liking, here is a google search which turned up these and quite a few more... Hope this helps
Here is one called MusicBrainz which tries to match up ID3 tags for you. Used it on iTunes imported mp3s and it did a not bad job..