I download music from frostwire and limewire then it goes directly to my iTunes and transfer it to my computer. Or you can download rhapsody application but you need 10$ monthly fee to download unlimited music to your iPhone and you can use that account to your iPod, iPad and your relatives iPhone too.
YES! there's a way. There are so many software out there that alternate the use of itunes. I strongly recomend that you try using copytransmanager. This software is completely portable and very easy to use. you just need to drag and drop the files that you want and then click update. You don't need to use itunes by using this tool. For a well detail video tutorial and instructions please visit this link : http://goo.gl/4wDXV