AceSudoku.comBy NConsulting ( Free )
Play the following puzzles: Sudoku: 6x6, 8x8, 9x9, 10x10, 12x12, 15x15, 16x16 Sudoku X (aka diagonal sudoku): 6x6, 8x8, 9x9, 10x10, 12x12, 15x15, 16x16 Jigsaw Sudoku (aka irregular or geometry sudoku): 6x6, 8x8, 9x9, 10x10, ...