Digital label of some sort, all of the albums are free. Really good ambient stuff one there, alongside other electronic music and some Metal. I recommend Khand, a friend of mine is behind that project.
Noisetrade is a pretty good site. I went to a NEEDTOBREATHE concert and found out about Matthew Mayfield. His latest album is found in the website. You can download his whole album for free, and if you want, you can give a little tip for support
From what I've seen so far, it's mostly indie stuff. I think there's some music that you might be looking for there, though.