Who doesn't love free books? HundredZeros.com is an updated catalogue of books that are available for free through Amazon
haven't had time to look around too much, but it seems as though the
free stuff are the books that are shown on the main page. I did a search
which came up with lots of results, but none of them were free. It
would be a good place to check out every couple of days though and see
if there is anything that interests you.