NumberDrop - A uniquely challenging math puzzle game.
MathIsFun Times Table - Learn Your Multiplication Tables
Griddition - Griddition is a challenging numbers puzzle where you must fill a grid with numbers, Sudoku-style.
GCompris - Educational Game for Children 2 to 10 years old.
Math Search - See posts, photos and more on Facebook.
I Know It - "I Know It" is an online game for practicing primary-level math concepts.