Basically if you have a library card you can download 6 songs each and every week—for free! They never expire and every Monday you get 6 more songs. No strings attached, and it’s perfectly legal.
They have a wide variety of artists and genres:
Mumford & Sons
I Am They
Broadway Cast albums
Huge selection of classical music
…and much more. They don’t have everything, but they do have a lot. New releases even appear on Freegal at the same time as they appear on places like iTunes!
They also offer a selection of music videos that you can download. (One music video counts as two music downloads.)
Check it out!