Peg Solitaire (also called "Solo Noble" "Brainvita") is a board game played by just one person. The rule is quite easy and there are a lot of variation.
This app is more than traditional Peg Solitaire. Up to 80 puzzles based on classic English style are included, from very easy to quite difficult. You can solve it one by one, or just pick one randomly.
Rules: Click to pick one peg to jump over another one to an empty hole. Jumping left, right, up or down is allowed. The jumped peg will be removed. If you can remove all pegs except one, you pass.

If you like solving puzzles, you will like it. It is free, download and try it.