All the pokerrooms that accepts bitcoins:
BetcoinPoker , 100% bonus with your first deposit , and daily freeroll.
Nitrogen Sports Poker Hourly Freeroll with 1mBtc prize
Switch Poker , 5€ free no deposit required , and 100% bonus up to 600$ , mobile , you can play on your iphone , android or tablet. Works in $/€ but accept deposit in bitcoins.
RedStar Poker , 200% bonus up to 1000$ , 10000$ in frerolls monthly , works in $ but accept bitcoins.