Solitaire This is a simple free solitaire collection including Klondike, Spider, Frecell, and Forty Thieves. Interface is easy to use and the graphics easy to read.
250+ Solitaire Collection This is a free collection of 253 card Solitaire games. What the game collection lacks in graphics and sophistication it makes up for by having so many different games!
Solitaire MegaPack This game is US$2.99. The graphics, ease of use, and the sophisticated stats make it worth the money!
Cribbage Pro Online! This is a great cribbage game for US$2.99 that you can play with other Android users or even friends on their iPhone. The only frustrating part of this game is when your opponent quits during the game you do not get credit for a win.
Casino Blackjack Pro This game is US$0.99 and has all the features of a casino blackjack game - serious blackjack fans will rejoice. Plus you can customize your rules or decks. It's an awesome app to train on for real blackjack games. The only downside to this app is that it only contains single player.