NumberDrop - A uniquely challenging math puzzle game.
MathIsFun Times Table - Learn Your Multiplication Tables
Sum Fun - A fun number puzzle game for iPhone and iPad.
I Know It - "I Know It" is an online game for practicing primary-level math concepts.
Sum - Simple Maths Puzzle - How fast can you add two numbers?
GCompris - Educational Game for Children 2 to 10 years old.