Solitaire card games. 
In the TriPeaks game try to clear all three pyramids of cards by removing cards in either ascending or descending value.
In the Pairs game remove cards in pairs until the board is cleared.
In the Pyramid game remove cards that add up to 13 until the Pyramid is cleared.
The Match game is a memory matching game. Try to remember where you saw a matching pair of cards and remove the matching pairs.