SPIN Magazine offers downloads of SPIN's Newermind: Nirvana MP3 Tribute Album for free when you "like" its Facebook page. (After liking the page, enter your email address; a download link will be sent to you.) That's the best deal we could find for this 13-track, DRM-free rock album. It features tribute covers from Nirvana's Nevermind (released 20 years ago this September) by Butch Walker and the Black Widows, Meat Puppets, Foxy Shazam, EMA, and more.