From the developer forum Nokia comes Sudoku master , a version of the famous Game Sudoku for our Nokia N8, C7, C6-01, E7, E6 and X7 , and for our Nokia 5800, 5530, 5230, C6, C5-03, X6 , N97 and Nokia N900 , developed with Qt Quick.
Several types of Sudokus on Ovi Store, but almost all of payment from 7 euros to 1 euro, but this Sudoku master perfectly ful fills its mission, besides having a very practical usability when the numbers get. Perhaps missing several levels of difficulty, but in future updates could be included.
Sudokumaster is available free from the Forum Nokia.
Sudokumaster | Symbian S60v5
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Sudokumaster | Maemo