Knight Features Publishing syndicate in the UK and Ireland. Offers several variations, including classic, colour, kids, and Sudoku Word. http://www.knightfeatures.com/KFWeb/content/features/kffeatures/puzzlesandcrosswords/KF/Sudoku/Sudoku_Classic/sudoku_classic.html Knightfeatures.com~Site InfoWhoisTrace RouteRBL Check
Sudoku History, instructions, variants and puzzles in four difficulty levels (PDF format). [German/French/English/Spanish/Italian] http://www.sudoku.li/english/ Sudoku.li~Site InfoWhoisTrace RouteRBL Check
Sudoku Puzzles Free daily puzzles with five difficulty levels with their solutions. Also offers guide to solve Sudoku puzzles. http://www.sudokupuzz.com Sudokupuzz.com~Site InfoWhoisTrace RouteRBL Check
The Times Sudoku Daily sudoku and killer sudoku puzzles from The Times newspaper, London. http://entertainment.timesonline.co.uk/tol/arts_and_entertainment/games_and_puzzles/sudoku/ Timesonline.co.uk~Site InfoWhoisTrace RouteRBL Check
Sudoku Generates and solves classic and X-Sudoku Problems. Diverse options and an integrated help facility makes this program best of class. http://home.arcor.de/clemens-pichl/Sudoku.htm Arcor.de~Site InfoWhoisTrace RouteRBL Check
SuDoKu-Cracker Only creates puzzles with a "unique solution". The built-in generator has six different levels of difficulty and can generate many (millions) different puzzles. All puzzles can be printed, exported, saved and opened again. http://www.the24net.com/sudoku/ The24net.com~Site InfoWhoisTrace RouteRBL Check