Long back, I was used Freebitco.in site. If you work correctly, it is a good site to win free bitcoins for every hour. For remaining details, please research on the site and ask the present users.
Im currently using the site. And while the pay is minimal for new users, those who have lost or played for awhile get larger claims. Im not a fan of the long wait for each claim, but hey you really can only say thank you after you actually get some real btc.