Mine would be Stake. It is a brand new website from the creators of Primedice.com (or use my refferal link: https://primedice.com/?c=kristoffff
and ill give u 50% of my comission.
Stake has 12 different bitcoin games, all are provably fair.
Some of the games are: Plinko, Classic Dice, Blackjack, DIamond Poker, Mines, Chartbet and many more!
If you are interested in joining you can always join : https://stake.com/?code=BitcoinOfficial
Join now and u will get an avatar that is only available this week.