ABCYa: Math Bingo MathIsFun: Add 'em Up (flash)
ABCYa: Math Man MathPlay: Basketball (flash)
Arcademics: Alien Addition (multiplayer) MathPlayground: Addition Blocks
Arcademics: The Big Puppy Canoe Race (multiplayer) MathPlayground: Addition Snake (flash)
Arcademics: Four Wheel Fracas (multiplayer) MathPlayground: Amusement Park Addition (flash)
Arcademics: JetSki Addition (multiplayer) MathPlayground: Math Monster Addition
Arcademics: Kitten Match (multiplayer) MathPlayground: Math Racer Addition
Arcademics: Skateboard Pups (multiplayer) MathPlayground: Number Invaders Addition (flash)
Arcademics: TugBoat Addition (multiplayer) MathPlayground: Number Trails (flash)
Brainormous: Mathteroid (flash) MathPlayground: Puzzle Pics Addition Facts (flash)
CoolMath: Make 15 (flash) MathsFrame: Maths Invaders
CoolMath: Math Lines Make 4 (flash) Mr.Nussbaum: Becoming Lord Voldemath
CoolMath: Number Twins Make 4 (flash) Mr.Nussbaum: ComputerMice Mini Games
CountOn: Double, Treble, or Not (flash) Mr.Nussbaum: Defeat the Mayan Math Monster
eLearningForKids: Penguins Addition MrNussbaum: Mathemorphosis (flash)
EZSchool: Sum Chooser (flash) Mr.Nussbaum: Speed Math (Flash)
EZSchool: Tweet Tweet Addition (flash) Mr.Nussbaum: The Big Yellow Bus
FreeTrainingTutorial: Addition Dragons Mr.Nussbaum: Trimathlon
FreeTrainingTutorial: Addition Empire State Building Mr.Nussbaum: World Cup
FreeTrainingTutorial: Addition Sharks NJS: The Wall Addition
FreeTrainingTutorial: Addition Washington Monument PlayKidsGames: Robot Calculator (flash)
FreeTrainingTutorial: Central Park Fun PlayKidsGames: Save the Apples (flash)
FreeTrainingTutorial: Sea Life Addition PlayKidsGames: Shuttle Launch (flash)
FreeTrainingTutorial: Sharks RoomRecess: Block Buster
FreeTrainingTutorial: Town Creator Scholastic: Dude's Dilemma (flash)
Fun4theBrain: Edgemoor Tournament (flash) SheppardSoftware: Add Like Mad
FunBrain: Bumble Numbers SheppardSoftware: Balloon Pop (flash)
Funbrain: Math Baseball SheppardSoftware: Bugabaloo Shoes
FunBrain: Moon Rocks SheppardSoftware: Catch the Falling Stars (flash)
Funbrain: Tic Tac Toe Squares SheppardSoftware: Fruit Shoot (flash)
GamesBears: Tom and Jerry Math (flash) SheppardSoftware: Matching Math
HoodaMath: Number Eaters (flash) SheppardSoftware: Matching Math Addition with Missing Numbers (flash)
HoodaMath: Skater Math SheppardSoftware: MathMan Addition
ictGames: 100 Hunt SheppardSoftware: Monkey Drive
ictGames: Archery Doubles SheppardSoftware: Penguin Party
ictGames: Balloon Flight Addition ToyTheater: Cavern (Make ten)
ictGames: Depth Charger (adding tens) VarsityTutors: MATHO (Flash)
ictGames: Funky Mummy XPMath: Addition Blocks (flash)
ictGames: Mummy Number Lines XPMath: Need for Speed (flash)
ictGames: Smoothie Maths XPMath: Whole Numbers Addition (flash)
Arcademic Skill Builders Has multiplayer games
Multiplication.com (Addition) Has multiplayer games
Sheppard Software