This is probably way late but The Pragmatic Bookshelf, publishers of fine programming books, have launched a free monthly magazine called PragPub that covers a variety of topics. For instance, this month has a nice overview of how to use Sass. Past topics have included articles about Clojure, automating screencasts and managing life projects.

Granted, they are ultimately pushing their books (which I think are excellent) but they are releasing the magazine in PDF, epub and mobi. How cool is that?