FlipIt for

From Dove Software:

FlipIt consists of a grid of cells which can be on(shaded) or off(blank). Each time you click on a cell, you toggle the state of that cell and the 4 cells above, below, left and right of it. The object of FlipIt is to turn all of the cells in the grid off. To change the board options, select New Game from the Options menu. There you can change the size of the board, select a random board, or have a randomly generated board which is solvable in a specific number of moves.