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Sum - Simple Maths Puzzle - How fast can you add two numbers?
Sudoku Portable - Sudoku Portable is a an addictive puzzle game originally created in France over 100 years ago.
Griddition - Griddition is a challenging numbers puzzle where you must fill a grid with numbers, Sudoku-style.
Yasminoku - Sudoku game and solver totally written in DHTML.
Sum Fun - A fun number puzzle game for iPhone and iPad.
HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.