I have not done a bunch of research on this yet, but I will. I will keep you all updated as I find out more.
The web site Education-Portal.com has listed numerous college course that are at no cost to you other than books and time. I looked up a class and it was given by a professor that is teaching at MIT. I have not found out if the web site is accredited or not just yet. Like I said I will keep you all posted on this one. If anyone has any info please let us know.