For Pokerfans who would like to try their luck and skill without risking their money, these sites do give real money to free entrant of the tournaments.
1. SWCPoker.eu - Free tournament every hour with 1000 satoshi reward. Quarantine special free tournament twice a day with 20,000 satoshis each. And other free tournaments for high Krill users.
2. Poker.com - Free tournament twice a day with 25,000 satoshi rewards each.
If you know any more keep on adding.
I would exclude Poker.com from the list. The site is no longer as it used to be 2 months ago. Currently they are promoting various poker rooms the reputation of which is unknown. I think they are just paid by those sites, and that's it.