Image via WikipediaSolitaire Free Pack, and its paid cousin Solitaire Mega Pack, is basically solitaire card games packed into a single app. The full version features... 110 different solitaire games, some of them use up to 3 separate decks. Plus there are "speed games" where you play against the AI in competition of speed.
Due to the sheer variations available this is a great little game. Not too much graphical flair, but it's a CARD game sim! On the other hand, it's not as pretty, say Solitaire Deluxe.
Download the free one, which has ads, or pay $2.99 and get the full version.
Solitaire Free Pack, Free
Solitaire Mega Pack, $2.99