Android Blackjack by Kenneth Riggio is a variation of the most popular casino card games in the world to the Android mobile platform.
The author ported this program in attempt to learn about the new mobile platform. Thus there are some error messages popping here and there, but it's rather playable.
Blackjack (also known as Twenty-one, Vingt-et-un (French for Twenty-one), or Pontoon) is one of the most popular casino card games in the world. Much of blackjack's popularity is due to the mix of chance with elements of skill, and the publicity that surrounds card counting (keeping track of which cards have been played since the last shuffle).
There is also a Spanish version of the game available. It was translated by Spanish enthusiast as the author provided the sources.