The neurophilosopher and mind hacks have already pointed these out, but it always helps to spread the word. David Chalmers and David Bourget from the Australian National University (ANU) have compiled an impressive list of free online papers on the philosophy of mind, the philosophy of cognitive science, and the science of consciousness. When I say impressive I mean IMPRESSIVE! - over 18000 references in total, with close to 5000 references on consciousness alone. Visit the full list here, and the consciousness specific list here. I welcome feedback from readers who have a head for philosophy of mind (excuse the pun) as to the quality and breadth of these resources.