10 seconds of math - Practice mental arithmetic
HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.
Sum Fun - A fun number puzzle game for iPhone and iPad.
Griddition - Griddition is a challenging numbers puzzle where you must fill a grid with numbers, Sudoku-style.
Math Master - Brain Quizzes - Math Master is a free math quiz game designed for all ages!
Planet Sudoku - Play millions of free Sudoku puzzles online for kids to experts. Sudoku puzzles like 9x9, Samurai, 4x4, 6x6, 8x8, 12x12, 16x16, 20x20 and 25x25.