Sudoku.com	Includes an overview of how Sudoku is solved, a monthly contest and a downloadable Sudoku game. Also includes a kids section and discussion forums.
Web Sudoku	Play Sudoku online from easy to evil. Web Sudoku also supplies Sudoku puzzles for newspapers, magazines, Sudoku books and websites.
Sudoku Online	Home of the Sudokulist - Includes Sudoku tips and strategies as well as a downloadable game and a 3D Sudoku puzzle.