I put together two free stock background packs for free download via my deviantart page. I was going through some of my photos the other day and thought these might be good to put up there. I used other peoples stock for a long time so I felt that it would be good to pay that back by putting some of my own stock up.
You will need a deviant art account to access them. Full terms and conditions are on the link provided you can find them here.
Hopefully more will be coming soon, until then you can find more of my stock and textures here.
Have fun & be creative,