Excel @ Sudoku is an Excel Sudoku helper, not a solver. This means it will help you with the puzzle while not taking all the fun away. A must-have for all Su Doku lovers. Excel @ Sudoku runs on Microsoft Excel--which means that there is no big download to administer. That's the free version - the upgraded version features Samurai Sudoku support--the new, cool Sudoku variation. With the updgrade comes colour support, and a whole new bunch of features.
||Free to try
||Windows (all), Excel