NumberDrop - A uniquely challenging math puzzle game.
Math Games - Math Games is a website which kids in Preschool through 8th grade can practice math.
Sum Fun - A fun number puzzle game for iPhone and iPad.
GCompris - Educational Game for Children 2 to 10 years old.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
DragonBox Algebra - DragonBox Algebra 5+ - The educational game that secretly teaches you algebra.