Yahtzee Hold 'Em - Free for Android
To start out you roll two dice, which is your hand. You must use these two dice. You then reveal "The Flop", "The Turn" and "The River" as you would in Texas Hold 'Em. To get your desired dice, you may select 3 of the 5 dice to use with your "hand".
In addition to the above, there is also a slight gambling aspect involved. Each sequence, after rolling your two dice, you can lock in what you think you might be able to get. There is a multiplier used, that starts at 4 after you roll your two dice hand, and ends at 1 after "The River" is revealed. With this, you can try to rack up huge point totals if you get lucky enough.
There is a "How to Play" section in the menu of the game with all of the details, as well as a High Scores section that keeps track of your 3 highest scores.