What are some sites that every aspiring artist should have their music uploaded on? (x-post from Askreddit)

I'm basically looking for more ways to promote my music. I'd prefer the sites be free to use but I won't rule out any that may have cost and are worth it.

My music is free to download/stream at www.reverbnation.com/hailpretender though I warn its not for every bodies taste (hardcore/metal/screamo/whatever)

Your comments are appreciated!