MathIsFun Times Table - Learn Your Multiplication Tables
DragonBox Numbers - Teach kids about numbers with an easy and fun game
DragonBox Algebra - DragonBox Algebra 5+ - The educational game that secretly teaches you algebra.
Wikids - An encyclopedia that talks to your kids
Cool Math Endless Run - Cool Math Endless Run is a monster math game and an endless run adventure.
Four Seconds - A timer and a simple rule: stop it at exactly four seconds.