Not in a legal way that is known of.
It depends whether the item you are downloading is free without using BitTorrent. If it is free, then it is legal. But if it has to be paid for, then it is illegal.
dilandau.eu
Depends on what you mean by "free music." If the music is free because you're not supposed to pay for it, then downloading it to your phone is probably legal. If the music is free because you're not paying for it, then whether or not downloading it to your phone is legal depends on whether or not you're supposed to pay for it.
yes
not likely
It depends on the website and who the person is? If you know the person and if they're okay with you downloading it then it should be legal.
Frostwire
No, using blubster is not legal. It is a file-sharing program that features free torrent downloads for music and movies.
You should not be downloading free songs. Downloading free songs is illegal, no matter how many sites claim to be completely legal. You should be buying the songs from iTunes or other legal places to get songs.
creative commons
Limewire itself is legal, but downloading for free is not. if you pay for it, its ok.