* Downloading files from music sites
Free music can be found in so many places over the Internet. These free songs are usually found in file-sharing sites. However, they can also be found in websites that simply provide free music. Though these sites are popular for obvious reasons, they are also most likely violating copyright laws. Some old songs, however, can already be shared over the Internet without the risk of commiting a crime. Note though that some sites are authorized to provide samples of music from some artists' albums. Whatever the purpose or situation, free music over the Internet are downloaded -- unless you can count streaming audio.
* As bonus tracks
Somtimes when you buy a CD, there are so-called bonus tracks. Though you pay a regular amount for the CD, there are extra titles included. You may not consider this as free because you already shelled out money for the whole CD. Nevertheless, bonus tracks are free songs in their own right.